Methyl Mercaptan

SECTION 2: Hazards identification

Emergency Overview DANGER! Toxic, flammable liquid and gas under pressure. May be fatal if inhaled. May form explosive mixtures with air. May cause eye, skin, and respiratory tract burns. May cause liver and kidney damage. Symptoms may be delayed. Self-contained breathing apparatus and protective clothing must be worn by rescue workers.

Principle Routes of Exposure

Inhalation. Swallowing. Skin contact. Eye contact. THRESHOLD LIMIT VALUE: TLV-TWA Data from 2004 Guide to Occupational Exposure Values (ACGIH). TLV-TWAs should be used as a guide in the control of health hazards and not as fine lines between safe and dangerous concentrations. EFFECTS OF A SINGLE (ACUTE) OVEREXPOSURE: INHALATION: Overexposure may cause irritation tot he eyes and mucous membranes, with headache, dizziness, nausea, vomiting, and possible central nervous depression leading to respiratory failure. May also cause pulmonary edema with liver and kidney damage. SKIN CONTACT: Exposure may cause irritation, experienced as redness and possible swelling. No evidence of adverse effects from available information. SKIN ABSORPTION: SWALLOWING: Not a likely route of exposure. This product is a gas at normal temperature and pressure, but may cause irritation of the mouth and throat. EYE CONTACT: May cause moderate conjunctivitis, seen as excess redness and swelling of the eye. EFFECTS OF REPEATED (CHRONIC) OVEREXPOSURE: Repeated overexposure of liquid to skin may cause dermatitis. OTHER EFFECTS OF OVEREXPOSURE: None known.

Medical Conditions Generally Aggravated by Exposure

OVEREXPOSURE Inhalation may aggravate asthma and inflammatory or fibrotic pulmonary disease. Because of its irritating properties, this material may aggravate an existing dermatitis. SIGNIFICANT LABORATORY DATA WITH POSSIBLE RELEVANCE TO HUMAN HEALTH HAZARD EVALUATION: None. CARCINOGENICITY: Not listed as carcinogen by OSHA, NTP or IARC.