FORMOTHION

Editor's Note: This material is not listed in the Emergency Response Guidebook. Based on the material's physical and chemical properties, toxicity, or chemical group, a guide has been assigned. For additional technical information, contact one of the emergency response telephone numbers listed under Public Safety Measures.

MOLECULAR FORMULA

C6-H12-N-O4-P-S2

ERG GUIDE NUMBER

152-SUBSTANCES - TOXIC (COMBUSTIBLE)

SYNONYM REFERENCE

(RTECS , 1990; HSDB , 1990; EPA, 1985)

USES/FORMS/SOURCES

USES

Formothion is used as a systemic or contact insecticide and acaricide (Sax & Lewis, 1987; EPA, 1985; Budavari, 1996; HSDB , 2000).
The ACGIH has established a Biological Exposure Index (BEI) for organophosphate cholinesterase inhibitors. Refer to the BIOMONITORING section for more information.

FORMS

Formothion is an organophosphate compound. It is a viscous yellow oil or crystalline mass; it solidifies at approximately 25 degrees C (HSDB , 2000). It is miscible with xylene, ketones, ether, alcohols, chloroform, and benzene, and is sparingly soluble in water (HSDB , 2000).
The effects of many of the organophosphates are similar. This review is based on the properties of organophosphates in general, with effects attributed specifically to formothion noted.

-CLINICAL EFFECTS

GENERAL CLINICAL EFFECTS

Formothion is an organophosphate compound. The following are symptoms from organophosphates in general, which are due to the anticholinesterase activity of this class of compounds. All of these effects may not be documented for formothion, but could potentially occur in individual cases.

In addition to typical anticholinesterase poisoning symptoms, formothion caused contact sensitization dermatitis with papules, erythema, and edema in one worker following direct skin contact. Irritation was not seen when formothion was instilled directly into the eyes of rabbits.

MUSCARINIC (PARASYMPATHETIC) EFFECTS may include bradycardia, bronchospasm, bronchorrhea, salivation, lacrimation, diaphoresis, vomiting, diarrhea, and miosis. NICOTINIC (SYMPATHETIC AND MOTOR) EFFECTS may include tachycardia, hypertension, fasciculations, muscle cramps, weakness, and RESPIRATORY PARALYSIS. CENTRAL EFFECTS may include CNS depression, agitation, confusion, delirium, coma, and seizures.

Children may exhibit different predominant signs and symptoms than adults: CNS depression, stupor, flaccidity, dyspnea, and coma are the most common signs in children.

POTENTIAL HEALTH HAZARDS - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 152 (ERG, 2004)

Highly toxic, may be fatal if inhaled, swallowed or absorbed through skin.
Contact with molten substance may cause severe burns to skin and eyes.
Avoid any skin contact.
Effects of contact or inhalation may be delayed.
Fire may produce irritating, corrosive and/or toxic gases.
Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.

ACUTE CLINICAL EFFECTS

Formothion has been said to be one of the least toxic agents of its class (EPA, 1985; HSDB , 2000). It can be absorbed following inhalation, ingestion, or dermal contact (Lewis, 1996; EPA, 1985). Based on an acute oral LD50 of 250 mg/kg in rats, formothion would be considered of intermediate toxicity relative to other organophosphates (Morgan, 1993). It was not an eye irritant in rabbits (HSDB , 2000).

A worker developed mild anticholinesterase poisoning symptoms and contact dermatitis following skin contact with a 0.00025% formothion solution (HSDB , 2000).

The hallmark of organophosphate poisoning is inhibition of plasma pseudocholinesterase and erythrocyte acetylcholinesterase (Namba, 1972).

Symptoms of organophosphate poisoning include nausea, vomiting, abdominal cramps, diarrhea, headache, giddiness, vertigo, weakness, sensation of tightness in the chest (after inhalation exposures), excessive tearing, loss of accommodation, ocular pain, blurring or dimness of vision, miosis, loss of muscle coordination, slurring of speech, fasciculations and twitching of muscles (particularly of tongue and eyelids), generalized profound weakness, mental confusion, disorientation, drowsiness, difficulty in breathing, excessive salivation and respiratory mucus, oronasal frothing, cyanosis, pulmonary rales and rhonchi, hypertension, hypotension, cardiac arrhythmias, random jerking movements, incontinence, convulsions, and coma (AH Hall , 1993).

Death from organophosphate poisoning occurs primarily from respiratory arrest arising from failure of the respiratory center, paralysis of respiratory muscles, intense bronchoconstriction, or all three (HSDB , 2000). In severe cases when the patient has been unconscious for some time, brain damage can occur from lack of oxygen (ILO, 1998).

Some symptoms of acute organophosphate poisoning, based upon experience with parathion, can persist for days to months afterwards. These include fatigue, ocular symptoms, EEG abnormalities, gastrointestinal complaints, excessive dreams, and intolerance to organophosphate exposure (ILO, 1998).

Delayed effects may be most pronounced with highly lipid-soluble organophosphates, such as fenthion, or the phosphorothioates, such as chlorpyrifos. After an initial period of apparent recovery, clinical effects may reoccur for up to several weeks after an acute exposure (Minton & Murray, 1988).

Some organophosphates can induce delayed neurological effects of a combined sensory-motor peripheral polyneuropathy. Sensation of numbness or tingling in the extremities may appear several weeks after acute exposure. It is not clear if all organophosphates have this activity (Cherniack, 1986; Wadia et al, 1987). For example, coumaphos induced delayed peripheral neuropathy in the standard hen assay (HSDB , 2000; Abou-Donia et al, 1982), but these delayed effects have not been reported in coumaphos-exposed humans.

CHRONIC CLINICAL EFFECTS

Formothion caused contact sensitization dermatitis with papules, erythema, and edema in one worker following direct skin contact (Mirakhmedov, 1973). Skin sensitivity tests to formothion were positive (Mirakhmedov, 1973). It was not a sensitizer in guinea pigs, however (HSDB , 2000).

Chronic exposure to organophosphates can lead to cumulative depression of cholinesterase levels until a critical lack of activity causes symptoms of organophosphate poisoning to appear, in a pattern similar to that of acute poisoning (Coye et al, 1986). The level of chronic exposure which can be tolerated depends on the rate of uptake and degradation of the organophosphate in the body in relation to its potency in inhibiting acetylcholinesterase, and the rate of the individual's replenishment of acetylcholinesterase activity.

Increased leukocyte and decreased lymphocyte counts were noted in dogs chronically fed formothion (HSDB , 2000). This effect has not been reported in exposed humans. Some deaths were observed in dogs chronically fed 100 mg/kg of formothion daily (HSDB , 2000). No ill effects were noted in dogs and rats fed 80 mg/kg of formothion in the diet for 2 years (HSDB , 2000). Dogs tolerated doses of 16 to 32 mg/kg of formothion daily in subchronic feeding studies; slight weight loss occurred at a dose of 35 mg/kg daily (HSDB , 2000). In rats, a daily oral dose of 4 mg/kg of formothion caused decreased activities of red cell cholinesterases, but plasma and brain cholinesterases were unaffected (Hayes & Laws, 1991).

-MEDICAL TREATMENT

LIFE SUPPORT

Support respiratory and cardiovascular function.

SUMMARY

FIRST AID - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 152 (ERG, 2004)

Move victim to fresh air.
Call 911 or emergency medical service.
Give artificial respiration if victim is not breathing.
Do not use mouth-to-mouth method if victim ingested or inhaled the substance; give artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device.
Administer oxygen if breathing is difficult.
Remove and isolate contaminated clothing and shoes.
In case of contact with substance, immediately flush skin or eyes with running water for at least 20 minutes.
For minor skin contact, avoid spreading material on unaffected skin.
Keep victim warm and quiet.
Effects of exposure (inhalation, ingestion or skin contact) to substance may be delayed.
Ensure that medical personnel are aware of the material(s) involved and take precautions to protect themselves.

FIRST AID

GENERAL

The following information is for Organophosphate Compounds in general.
Severe toxicity may develop rapidly following exposure or may be delayed by 12 hours or more. Rapid removal from toxic environments, decontamination procedures, and specific therapy if required are essential.
First responders, emergency medical, and emergency department personnel should take proper precautions (wear rubber gowns, rubber aprons, rubber gloves, etc) when treating patients with organophosphate poisoning to avoid contamination. Emesis containing organophosphates should be placed in closed impervious containers for proper disposal.

INHALATION EXPOSURE

INHALATION: Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with an inhaled beta2-adrenergic agonist. Consider systemic corticosteroids in patients with significant bronchospasm.
If respiratory tract irritation or respiratory depression is evident, monitor arterial blood gases, chest x-ray, and pulmonary function tests.
Carefully observe patients with inhalation exposure for the development of any systemic signs or symptoms and administer symptomatic treatment as necessary.

DERMAL EXPOSURE

Systemic effects can occur from dermal exposure to organophosphates.
DECONTAMINATION: Remove contaminated clothing and jewelry and place them in plastic bags. Wash exposed areas with soap and water for 10 to 15 minutes with gentle sponging to avoid skin breakdown. A physician may need to examine the area if irritation or pain persists (Burgess et al, 1999).
Some chemicals can produce systemic poisoning by absorption through intact skin. Carefully observe patients with dermal exposure for the development of any systemic signs or symptoms and administer symptomatic treatment as necessary.

EYE EXPOSURE

DECONTAMINATION: Remove contact lenses and irrigate exposed eyes with copious amounts of room temperature 0.9% saline or water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist after 15 minutes of irrigation, the patient should be seen in a healthcare facility.
Patients symptomatic following exposure should be observed in a controlled setting until all signs and symptoms have fully resolved.

ORAL/PARENTERAL EXPOSURE

Inducing emesis is contraindicated because of possible early onset of respiratory depression and seizures.
PREHOSPITAL ACTIVATED CHARCOAL ADMINISTRATION

Consider prehospital administration of activated charcoal as an aqueous slurry in patients with a potentially toxic ingestion who are awake and able to protect their airway. Activated charcoal is most effective when administered within one hour of ingestion. Administration in the prehospital setting has the potential to significantly decrease the time from toxin ingestion to activated charcoal administration, although it has not been shown to affect outcome (Alaspaa et al, 2005; Thakore & Murphy, 2002; Spiller & Rogers, 2002).

In patients who are at risk for the abrupt onset of seizures or mental status depression, activated charcoal should not be administered in the prehospital setting, due to the risk of aspiration in the event of spontaneous emesis.
The addition of flavoring agents (cola drinks, chocolate milk, cherry syrup) to activated charcoal improves the palatability for children and may facilitate successful administration (Guenther Skokan et al, 2001; Dagnone et al, 2002).

ACTIVATED CHARCOAL: Administer charcoal as a slurry (240 mL water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents, 25 to 50 g in children (1 to 12 years), and 1 g/kg in infants less than 1 year old.
Suction oral secretions.
ATROPINE THERAPY - If symptomatic from organophosphate poisoning, administer IV atropine until lung fields are clear to auscultation. Adult - 2 to 5 mg every 10 to 15 minutes; Child - 0.05 mg/kg every 10 to 15 minutes. Atropinization may be required for hours to days depending on severity.
PRALIDOXIME (PROTOPAM, 2-PAM) - Severe organophosphate poisoning, characterized by profound weakness and respiratory depression, should also be treated with 2-PAM. Adult - 1 to 2 g IV at 0.5 g per min; Child - 25 to 50 mg/kg over 5 to 30 minutes; may repeat in one hour and every 6 to 12 hours if muscle weakness is not relieved or if patient is comatose. Continuous Infusion (Controversial) - Adult - 500 mg/hr. Pralidoxime may need to be administered over several days.
SEIZURES: Administer a benzodiazepine; DIAZEPAM (ADULT: 5 to 10 mg IV initially; repeat every 5 to 20 minutes as needed. CHILD: 0.1 to 0.5 mg/kg IV over 2 to 5 minutes; up to a maximum of 10 mg/dose. May repeat dose every 5 to 10 minutes as needed) or LORAZEPAM (ADULT: 2 to 4 mg IV initially; repeat every 5 to 10 minutes as needed, if seizures persist. CHILD: 0.05 to 0.1 mg/kg IV over 2 to 5 minutes, up to a maximum of 4 mg/dose; may repeat in 5 to 15 minutes as needed, if seizures continue).

Consider phenobarbital or propofol if seizures recur after diazepam 30 mg (adults) or 10 mg (children greater than 5 years).
Monitor for hypotension, dysrhythmias, respiratory depression, and need for endotracheal intubation. Evaluate for hypoglycemia, electrolyte disturbances, and hypoxia.

ACUTE LUNG INJURY: Maintain ventilation and oxygenation and evaluate with frequent arterial blood gases and/or pulse oximetry monitoring. Early use of PEEP and mechanical ventilation may be needed.
HYPOTENSION: Infuse 10 to 20 mL/kg isotonic fluid. If hypotension persists, administer dopamine (5 to 20 mcg/kg/min) or norepinephrine (ADULT: begin infusion at 0.5 to 1 mcg/min; CHILD: begin infusion at 0.1 mcg/kg/min); titrate to desired response.
CONTRAINDICATIONS - Succinylcholine and other cholinergic agents are contraindicated.

-RANGE OF TOXICITY

MINIMUM LETHAL EXPOSURE

GENERAL/SUMMARY

The minimum lethal human dose to this agent has not been delineated.
The actual lethal dose of an organophosphate can vary widely and depends strongly on the route and rate of exposure and on the aggressiveness of the treatment used.

MAXIMUM TOLERATED EXPOSURE

OCCUPATIONAL

A worker developed mild anticholinesterase poisoning symptoms and contact dermatitis following skin contact with a 0.00025 percent formothion solution (HSDB , 2000).
Three workers at a pesticide-formulating plant developed symptoms of organophosphate poisoning associated with each worker wearing a uniform that was contaminated with 76 percent parathion and then laundered. The uniform had been laundered three times before the third worker wore it and he still developed nausea, vomiting, and red cell cholinesterase activity of 75 percent of normal (Clifford & Nies, 1989).

PEDIATRIC

Note that CHILDREN MAY EXHIBIT DIFFERENT PREDOMINANT SIGNS of organophosphate poisoning from adults. In a study on 25 children poisoned by organophosphate or carbamate compounds, the major symptoms in most of them were CNS depression, stupor, flaccidity, dyspnea, and coma.
Other classical signs of organophosphate poisoning, such as miosis, fasciculations, bradycardia, excessive salivation and lacrimation, and gastrointestinal symptoms, were infrequent (Sofer et al, 1989).
Children tend to be more sensitive to organophosphates than adults (Zwiener & Ginsburg, 1988).

Carcinogenicity Ratings for CAS2540-82-1 :

ACGIH (American Conference of Governmental Industrial Hygienists, 2010): Not Listed
EPA (U.S. Environmental Protection Agency, 2011): Not Listed
IARC (International Agency for Research on Cancer (IARC), 2016; International Agency for Research on Cancer, 2015; IARC Working Group on the Evaluation of Carcinogenic Risks to Humans, 2010; IARC Working Group on the Evaluation of Carcinogenic Risks to Humans, 2010a; IARC Working Group on the Evaluation of Carcinogenic Risks to Humans, 2008; IARC Working Group on the Evaluation of Carcinogenic Risks to Humans, 2007; IARC Working Group on the Evaluation of Carcinogenic Risks to Humans, 2006; IARC, 2004): Not Listed
NIOSH (National Institute for Occupational Safety and Health, 2007): Not Listed
MAK (DFG, 2002): Not Listed
NTP (U.S. Department of Health and Human Services, Public Health Service, National Toxicology Project ): Not Listed

TOXICITY AND RISK ASSESSMENT VALUES

EPA IRIS

EPA Risk Assessment Values for CAS2540-82-1 (U.S. Environmental Protection Agency, 2011):

Not Listed

TOXICITY VALUES

References: RTECS, 2000
- LC50- (INHALATION)MOUSE:
- LC50- (INHALATION)RAT:
- LD50- (ORAL)CAT:
- LD50- (ORAL)GUINEA_PIG:
- LD50- (ORAL)MOUSE:
- LD50- (SKIN)MOUSE:
- LD50- (ORAL)RABBIT:
- LD50- (INTRAVENOUS)RAT:
- LD50- (ORAL)RAT:
- LD50- (SKIN)RAT:

-STANDARDS AND LABELS

WORKPLACE STANDARDS

ACGIH TLV Values for CAS2540-82-1 (American Conference of Governmental Industrial Hygienists, 2010):

Not Listed

AIHA WEEL Values for CAS2540-82-1 (AIHA, 2006):

Not Listed

NIOSH REL and IDLH Values for CAS2540-82-1 (National Institute for Occupational Safety and Health, 2007):

Not Listed

OSHA PEL Values for CAS2540-82-1 (U.S. Occupational Safety, and Health Administration (OSHA), 2010):

Not Listed

OSHA List of Highly Hazardous Chemicals, Toxics, and Reactives for CAS2540-82-1 (U.S. Occupational Safety and Health Administration, 2010):

Not Listed

ENVIRONMENTAL STANDARDS

EPA CERCLA, Hazardous Substances and Reportable Quantities for CAS2540-82-1 (U.S. Environmental Protection Agency, 2010):

Not Listed

EPA CERCLA, Hazardous Substances and Reportable Quantities, Radionuclides for CAS2540-82-1 (U.S. Environmental Protection Agency, 2010):

Not Listed

EPA RCRA Hazardous Waste Number for CAS2540-82-1 (U.S. Environmental Protection Agency, 2010b):

Not Listed
Editor's Note: The D, F, and K series waste numbers and Appendix VIII to Part 261 -- Hazardous Constituents were not included. Please refer to 40 CFR Part 261.

EPA SARA Title III, Extremely Hazardous Substance List for CAS2540-82-1 (U.S. Environmental Protection Agency, 2010):

Listed as: Formothion
Reportable Quantity, in pounds: 100

Only the statutory or final RQ is shown. For more information, see 40 CFR table 302.4.

Threshold Planning Quantity, in pounds:

100
Amount necessary to be covered by this standard. See 40 CFR 355.30.

Note(s): Not Listed

EPA SARA Title III, Community Right-to-Know for CAS2540-82-1 (40 CFR 372.65, 2006; 40 CFR 372.28, 2006):

Not Listed

DOT List of Marine Pollutants for CAS2540-82-1 (49 CFR 172.101 - App. B, 2005):

Not Listed

EPA TSCA Inventory for CAS2540-82-1 (EPA, 2005):

Not Listed

SHIPPING REGULATIONS

SURFACE

DOT -- Table of Hazardous Materials and Special Provisions (49 CFR 172.101, 2005):

Not Listed

ICAO International Shipping Name (ICAO, 2002):

Not Listed

LABELS

NFPA

NFPA Hazard Ratings for CAS2540-82-1 (NFPA, 2002):

Not Listed

-PERSONAL PROTECTION

SUMMARY

RECOMMENDED PROTECTIVE CLOTHING - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 152 (ERG, 2004)

Wear positive pressure self-contained breathing apparatus (SCBA).
Wear chemical protective clothing that is specifically recommended by the manufacturer. It may provide little or no thermal protection.
Structural firefighters' protective clothing provides limited protection in fire situations ONLY; it is not effective in spill situations where direct contact with the substance is possible.

Wear full protective clothing when working in the vicinity of spills or leaks or when fighting fires (AAR, 1987).

First responders, emergency medical, and emergency department personnel should take proper precautions (wear rubber gowns, rubber aprons, rubber gloves, etc) when treating patients with organophosphate poisoning to avoid contamination. Emesis containing organophosphates should be placed in closed impervious containers for proper disposal.

DECONTAMINATION: Remove contaminated clothing. Wash the skin, including the hair, beneath the nails, groin, and umbilical area, three times.

A single washing with soap and water can remove up to 80 to 92 percent of an organophosphate on the skin if done immediately (Fredriksson, 1961). If delayed, the same procedure may remove only 50 to 70 percent.
Following a soap and water wash, a second wash with 95% ethanol will leave only about a 5 to 10% organophosphate residue (Fredriksson, 1961).
The best results of skin decontamination are achieved with a thorough soap and water wash, followed by a 95 percent ethanol wash, followed by a second soap and water wash (Fredriksson, 1961).
Tincture of green soap contains 30 percent ethanol, and has been recommended for dermal decontamination of organophosphate exposures.

LEATHER: Leather absorbs organophosphates and is extremely difficult to decontaminate. Rescuers should not wear leather items that are not completely covered by rubber or impervious plastic. Contaminated leather items may need to be disposed of by incineration.

Any contaminated clothing should be discarded as hazardous waste. Repeated laundering may not remove organophosphate from clothing (Clifford & Nies, 1989).

RESPIRATORY PROTECTION

Wear a self-contained positive pressure breathing apparatus when working in the vicinity of spills or leaks or when fighting fires (AAR, 1987).

Refer to "Recommendations for respirator selection" in the NIOSH Pocket Guide to Chemical Hazards on TOMES Plus(R) for respirator information.

PROTECTIVE CLOTHING

CHEMICAL PROTECTIVE CLOTHING. Search results for CAS 2540-82-1.

Specific recommendations and test data for this chemical were not found in the available manufacturers' product literature. A complete list of consulted manufacturers and references is presented below.

-PHYSICAL HAZARDS

FIRE HAZARD

SUMMARY

Editor's Note: This material is not listed in the Emergency Response Guidebook. Based on the material's physical and chemical properties, toxicity, or chemical group, a guide has been assigned. For additional technical information, contact one of the emergency response telephone numbers listed under Public Safety Measures.
POTENTIAL FIRE OR EXPLOSION HAZARDS - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 152 (ERG, 2004)
- Combustible material: may burn but does not ignite readily.
- Containers may explode when heated.
- Runoff may pollute waterways.
- Substance may be transported in a molten form.
When formothion is heated to decomposition, it emits very toxic fumes of nitrogen oxides, phosphorus oxides, and sufur oxides (Sax & Lewis, 1989).

FLAMMABILITY CLASSIFICATION

NFPA Flammability Rating for CAS2540-82-1 (NFPA, 2002):

Not Listed

FIRE CONTROL/EXTINGUISHING AGENTS

SMALL FIRE PRECAUTIONS - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 152 (ERG, 2004)

Dry chemical, CO2 or water spray.

LARGE FIRE PRECAUTIONS - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 152 (ERG, 2004)

Water spray, fog or regular foam.
Move containers from fire area if you can do it without risk.
Dike fire control water for later disposal; do not scatter the material.
Use water spray or fog; do not use straight streams.

TANK OR CAR/TRAILER LOAD FIRE PRECAUTIONS - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 152 (ERG, 2004)

Fight fire from maximum distance or use unmanned hose holders or monitor nozzles.
Do not get water inside containers.
Cool containers with flooding quantities of water until well after fire is out.
Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank.
ALWAYS stay away from tanks engulfed in fire.
For massive fire, use unmanned hose holders or monitor nozzles; if this is impossible, withdraw from area and let fire burn.

NFPA Extinguishing Methods for CAS2540-82-1 (NFPA, 2002):

Not Listed

Choose an extinguishing agent suitable for fires in surrounding material (AAR, 1987).

Water may be used in flooding quantities as fog (AAR, 1987).

COMBUSTION TOXICITY

When formothion is heated to decomposition, it emits very toxic fumes of nitrogen oxides, phosphorus oxides, and sufur oxides (Sax & Lewis, 1989).

DUST/VAPOR HAZARD

When formothion is heated to decomposition, it emits very toxic fumes of nitrogen oxides, phosphorus oxides, and sufur oxides (Sax & Lewis, 1989).

REACTIVITY HAZARD

When formothion is heated to decomposition, it emits very toxic fumes of nitrogen oxides, phosphorus oxides, and sufur oxides (Lewis, 1996).

Most organophosphate pesticides degrade relatively rapidly in the environment; a notable exception is LEPTOPHOS, which is lipophilic (Abou-Donia, 1983).

All organophosphate esters undergo hydrolysis in water; generally the water-soluble products of hydrolysis are less toxic than the parent compound (Minton & Murray, 1988).

EVACUATION PROCEDURES

SUMMARY

Editor's Note: This material is not listed in the Table of Initial Isolation and Protective Action Distances.

SPILL - PUBLIC SAFETY EVACUATION DISTANCES - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 152 (ERG, 2004)

Increase, in the downwind direction, as necessary, the isolation distance of at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids in all directions.

FIRE - PUBLIC SAFETY EVACUATION DISTANCES - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 152 (ERG, 2004)

If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions.

PUBLIC SAFETY MEASURES - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 152 (ERG, 2004)

CALL Emergency Response Telephone Number on Shipping Paper first. If Shipping Paper not available or no answer, refer to appropriate telephone number:

MEXICO:

SETIQ:

01-800-00-214-00 in the Mexican Republic;
For calls originating in Mexico City and the Metropolitan Area: 5559-1588;
For calls originating elsewhere, call: 011-52-555-559-1588.

CENACOM:

01-800-00-413-00 in the Mexican Republic;
For calls originating in Mexico City and the Metropolitan Area: 5550-1496, 5550-1552, 5550-1485, or 5550-4885;
For calls originating elsewhere, call: 011-52-555-550-1496, or 011-52-555-550-1552; 011-52-555-550-1485, or 011-52-555-550-4885.

ARGENTINA:

CIQUIME:

0-800-222-2933 in the Republic of Argentina;
For calls originating elsewhere, call: +54-11-4613-1100.

BRAZIL:

PRÓ-QUÍMICA:

0-800-118270 (Toll-free in Brazil);
For calls originating elsewhere, call: +55-11-232-1144 (Collect calls are accepted).

COLUMBIA:

CISPROQUIM:

01-800-091-6012 in Colombia;
For calls originating in Bogotá, Colombia, call: 288-6012;
For calls originating elsewhere, call: 011-57-1-288-6012.

CANADA:

CANUTEC:

613-996-6666 (Collect calls are accepted);
*666 cellular (in Canada only).

UNITED STATES:

CHEMTREC®:

1-800-424-9300 (Toll-free in the U.S., Canada, and the U.S. Virgin Islands);
703-527-3887 for calls originating elsewhere (Collect calls are accepted).

CHEM-TEL, INC.:

1-800-255-3924 (Toll-free in the U.S., Canada, and the U.S. Virgin Islands);
813-248-0585 for calls originating elsewhere (Collect calls are accepted).

INFOTRAC:

1-800-535-5053 (Toll-free in the U.S., Canada, and the U.S. Virgin Islands);
352-323-3500 for calls originating elsewhere (Collect calls are accepted).

3E COMPANY:

1-800-451-8346 (Toll-free in the U.S., Canada, and the U.S. Virgin Islands);
760-602-8703 for calls originating elsewhere (Collect calls are accepted).

NATIONAL RESPONSE CENTER (NRC):

1-800-424-8802 - (24 hours) (Toll-free in the U.S., Canada, and the U.S. Virgin Islands);
202-267-2675 for calls in the District of Columbia.

MILITARY SHIPMENTS:

703-697-0218 - Explosives/ammunition incidents (Collect calls are accepted);
1-800-851-8061 - All other dangerous goods incidents.

NATIONWIDE POISON CONTROL CENTER (United States only):

1-800-222-1222 (Toll-free in the U.S.).

For additional details see the section entitled "WHO TO CALL FOR ASSISTANCE" under the ERG Instructions.
As an immediate precautionary measure, isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids.
Keep unauthorized personnel away.
Stay upwind.
Keep out of low areas.

Downwind evacuation should be considered if this material is involved in a fire or if a large discharge has occurred (AAR, 1987).

AIHA ERPG Values for CAS2540-82-1 (AIHA, 2006):

Not Listed

DOE TEEL Values for CAS2540-82-1 (U.S. Department of Energy, Office of Emergency Management, 2010):

Listed as Formothion
TEEL-0 (units = mg/m3): 0.05
TEEL-1 (units = mg/m3): 0.15
TEEL-2 (units = mg/m3): 0.27
TEEL-3 (units = mg/m3): 500
Definitions:

TEEL-0: The threshold concentration below which most people will experience no adverse health effects.
TEEL-1: The airborne concentration (expressed as ppm [parts per million] or mg/m(3) [milligrams per cubic meter]) of a substance above which it is predicted that the general population, including susceptible individuals, could experience notable discomfort, irritation, or certain asymptomatic, nonsensory effects. However, these effects are not disabling and are transient and reversible upon cessation of exposure.
TEEL-2: The airborne concentration (expressed as ppm or mg/m(3)) of a substance above which it is predicted that the general population, including susceptible individuals, could experience irreversible or other serious, long-lasting, adverse health effects or an impaired ability to escape.
TEEL-3: The airborne concentration (expressed as ppm or mg/m(3)) of a substance above which it is predicted that the general population, including susceptible individuals, could experience life-threatening adverse health effects or death.

AEGL Values for CAS2540-82-1 (National Research Council, 2010; National Research Council, 2009; National Research Council, 2008; National Research Council, 2007; NRC, 2001; NRC, 2002; NRC, 2003; NRC, 2004; NRC, 2004; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2007; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2005; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2005; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2007; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; United States Environmental Protection Agency Office of Pollution Prevention and Toxics, 2006; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2007; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2007; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2007; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2007; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2007; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2009; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2009; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2009; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2009; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2009; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2009; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2009; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2009; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2009; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2009; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2009; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2009; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2009; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2007; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2007; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2007; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2007; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2007; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2007; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2005; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2005; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2005; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2005; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2005; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2005; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2005; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2005; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2007; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2005; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; 62 FR 58840, 1997; 65 FR 14186, 2000; 65 FR 39264, 2000; 65 FR 77866, 2000; 66 FR 21940, 2001; 67 FR 7164, 2002; 68 FR 42710, 2003; 69 FR 54144, 2004):

Not Listed

NIOSH IDLH Values for CAS2540-82-1 (National Institute for Occupational Safety and Health, 2007):

Not Listed

CONTAINMENT/WASTE TREATMENT OPTIONS

SUMMARY

SPILL OR LEAK PRECAUTIONS - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 152 (ERG, 2004)
- ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area).
- Do not touch damaged containers or spilled material unless wearing appropriate protective clothing.
- Stop leak if you can do it without risk.
- Prevent entry into waterways, sewers, basements or confined areas.
- Cover with plastic sheet to prevent spreading.
- Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers.
- DO NOT GET WATER INSIDE CONTAINERS.
RECOMMENDED PROTECTIVE CLOTHING - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 152 (ERG, 2004)
- Wear positive pressure self-contained breathing apparatus (SCBA).
- Wear chemical protective clothing that is specifically recommended by the manufacturer. It may provide little or no thermal protection.
- Structural firefighters' protective clothing provides limited protection in fire situations ONLY; it is not effective in spill situations where direct contact with the substance is possible.
DECONTAMINATION OF SPILLS
- A variety of methods have been described for organophosphate spill decontamination, most of which depend on changing the pH to promote hydrolysis to inactive phosphate diester compounds (EPA, 1978). The rate of hydrolysis depends on both the specific organophosphate compound involved and the increase in pH caused by the detoxicant used (EPA, 1975a; EPA, 1978).
Disposal of large quantities or contamination of large areas may be regulated by various governmental agencies and reporting may be required.
Water spray may be used to reduce or knock down vapors (AAR, 1987).

SMALL LEAK/SPILL

Isolate and ventilate the area. Keep sources of fire away. Wear rubber or neoprene gloves and overshoes and an approved respirator. Get fire-fighting equipment ready. Contain any liquid spill around the edge and absorb with Zorb-All (R), soil, sweeping compound, sawdust, dry sand or similar material. Dispose of absorbed or dry material in disposible containers (EPA, 1975; (Ford, 1989).
Scrub the spilled area with concentrated detergent such as TIDE(R), ALL(R), or similar material. Re-absorb scrubbing liquid and dispose as above (Ford, 1989). Several washes may be required for decontamination (EPA, 1978).

LARGE LEAK/SPILL

Isolate and ventilate the area. Keep sources of fire away. Wear rubber or neoprene gloves and overshoes and approved personal protection equipment. Get fire-fighting equipment ready (Ford, 1989).
Treatment of the spilled material with alkaline substances such as sodium carbonate (soda ash), sodium bicarbonate (baking soda), calcium hydroxide (slaked or hydrated lime, lime or lime water when in dilute solutions), and calcium carbonate (crushed limestone) may be used for detoxification (EPA, 1975a).
- In general, it would be preferable to detoxify spilled material before absorbing for disposal whenever possible.
Contain any liquid spill around the edge and absorb with Zorb-All(R), soil, sweeping compound, sawdust, dry sand or similar material. Dispose of absorbed or dry material in disposible containers (EPA, 1975; (Ford, 1989). Containers should be sealed to prevent further decontamination.
After the bulk of the material has been removed, further decontaminate spoiled surfaces with alkaline treatment as described above, or with concentrated alkaline detergent. Absorb and dispose of waste water as described above.
Water spray may be used to reduce or knock down vapors (AAR, 1987).
Disposal of large quantities or contamination of large areas may be regulated by various governmental agencies and reporting may be required. Consult the local Emergency Response Committee for guidance.

-ENVIRONMENTAL HAZARD MANAGEMENT

POLLUTION HAZARD

Formothion does not occur naturally. It has been released to the environment as a result of its production and use (HSDB, 2003).

ENVIRONMENTAL FATE AND KINETICS

SOIL

TERRESTRIAL
- The half-life of formothion in loamy soil is 14 days (Spencer, 1982).
- In soil, one day after application of approximately 30 parts per million formothion, only 0.24 parts per million unchanged formothion remained; suggesting little danger of residues accumulating in soil (HSDB , 1990).

ENVIRONMENTAL TOXICITY

No information found at the time of this review.

-PHYSICAL/CHEMICAL PROPERTIES

MOLECULAR WEIGHT

257.27 (Budavari, 1996)

DESCRIPTION/PHYSICAL STATE

Formothion is a viscous, yellow, oily liquid or a crystalline mass solid (EPA, 1985; Lewis, 1996; Budavari, 1996; HSDB , 2000).

Formothion is considered an alkaline pesticide (EPA, 1985).

VAPOR PRESSURE

8.5x10(-6) mmHg (at 20 degrees C) (Spencer, 1982)

DENSITY

OTHER TEMPERATURE AND/OR PRESSURE

1.361 g/cm(3) (at 20 degrees C) (Spencer, 1982)

FREEZING/MELTING POINT

MELTING POINT

25-26 degrees C; 77 degrees F (Spencer, 1982)

BOILING POINT

decomposes on distillation (HSDB , 1990)

SOLUBILITY

IN WATER

slightly soluble in water (2.6 g/L) (Worthing, 1983)

IN ORGANIC SOLVENTS

Miscible in alcohols, ether, chloroform, and benzene (Budavari, 1996); xylene (HSDB , 2000); ketones (Spencer, 1982).
Very slightly soluble in paraffin oil (< 0.1%) (HSDB , 2000).

OTHER/PHYSICAL

INDEX OF REFRACTION

1.5541 (at 20 degrees C) (Spencer, 1982)

-REFERENCES

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62 FR 58840: Notice of the National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances - Proposed AEGL Values, Environmental Protection Agency, NAC/AEGL Committee. National Archives and Records Administration (NARA) and the Government Publishing Office (GPO), Washington, DC, 1997.

65 FR 14186: Notice of the National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances - Proposed AEGL Values, Environmental Protection Agency, NAC/AEGL Committee. National Archives and Records Administration (NARA) and the Government Publishing Office (GPO), Washington, DC, 2000.

65 FR 39264: Notice of the National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances - Proposed AEGL Values, Environmental Protection Agency, NAC/AEGL Committee. National Archives and Records Administration (NARA) and the Government Publishing Office (GPO), Washington, DC, 2000.

65 FR 77866: Notice of the National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances - Proposed AEGL Values, Environmental Protection Agency, NAC/AEGL Committee. National Archives and Records Administration (NARA) and the Government Publishing Office (GPO), Washington, DC, 2000.

66 FR 21940: Notice of the National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances - Proposed AEGL Values, Environmental Protection Agency, NAC/AEGL Committee. National Archives and Records Administration (NARA) and the Government Publishing Office (GPO), Washington, DC, 2001.

67 FR 7164: Notice of the National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances - Proposed AEGL Values, Environmental Protection Agency, NAC/AEGL Committee. National Archives and Records Administration (NARA) and the Government Publishing Office (GPO), Washington, DC, 2002.

68 FR 42710: Notice of the National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances - Proposed AEGL Values, Environmental Protection Agency, NAC/AEGL Committee. National Archives and Records Administration (NARA) and the Government Publishing Office (GPO), Washington, DC, 2003.

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