The following first aid measures are suggested (National Institute for Occupational Safety and Health, 2007):

Move victims of inhalation exposure from the toxic environment and administer 100% humidified supplemental oxygen with assisted ventilation as required. Exposed skin and eyes should be copiously flushed with water. Following ingestion, measures to decrease absorption may be useful if the patient is seen soon after the exposure.

Monitor thyroid function tests in patients with significant 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 bronchospasm and wheezing occur, consider treatment with inhaled sympathomimetic agents.

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).

Treat dermal irritation or burns with standard topical therapy. Patients developing dermal hypersensitivity reactions may require treatment with systemic or topical corticosteroids or antihistamines.

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.

GASTRIC LAVAGE: Consider after ingestion of a potentially life-threatening amount of poison if it can be performed soon after ingestion (generally within 1 hour). Protect airway by placement in the head down left lateral decubitus position or by endotracheal intubation. Control any seizures first.

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.

Ethylene thiourea is likely a human carcinogen. It is considered by the US EPA as a Group B2 oncogen (probable human carcinogen). IARC considers it a possible human carcinogen. Supporting experimental animal data exist, although no human data exist (EPA, 1988; (Hathaway et al, 1991; HSDB , 1997).

Ethylene thiourea may reasonably be anticipated to be a carcinogen (Budavari, 1996).

3 : The agent (mixture or exposure circumstance) is not classifiable as to its carcinogenicity to humans. This category is used most commonly for agents, mixtures and exposure circumstances for which the evidence of carcinogenicity is inadequate in humans and inadequate or limited in experimental animals. Exceptionally, agents (mixtures) for which the evidence of carcinogenicity is inadequate in humans but sufficient in experimental animals may be placed in this category when there is strong evidence that the mechanism of carcinogenicity in experimental animals does not operate in humans. Agents, mixtures and exposure circumstances that do not fall into any other group are also placed in this category.

Ca : NIOSH considers this substance to be a potential occupational carcinogen (See Appendix A in the NIOSH Pocket Guide to Chemical Hazards).

Category 3B : Substances for which in vitro or animal studies have yielded evidence of carcinogenic effects that is not sufficient for classification of the substance in one of the other categories. Further studies are required before a final decision can be made. A MAK value can be established provided no genotoxic effects have been detected. (Footnote: In the past, when a substance was classified as Category 3 it was given a MAK value provided that it had no detectable genotoxic effects. When all such substances have been examined for whether or not they may be classified in Category 4, this sentence may be omitted.)

Slope Factor:

RfD: 8x10(-5) mg/kg-day

Unit Risk:

RfC:

Unit Risk:

TWA: Use encapsulated form.

STEL:

Ceiling:

Carcinogen Listing: (Ca) NIOSH considers this substance to be a potential occupational carcinogen (See Appendix A in the NIOSH Pocket Guide to Chemical Hazards).

Skin Designation: Not Listed

Note(s): See Appendix A

10 (4.54)

10 (4.54)

MEXICO:

ARGENTINA:

BRAZIL:

COLUMBIA:

CANADA:

UNITED STATES:

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.

2 g (at 30 degrees C)

9 g (at 60 degrees C)

44 g (at 90 degrees C)