Brief exposure to high concentrations and prolonged inhalation of lower concentrations are problematic. Exposure levels leading to death vary from 1,600 to 60,000 ppm, depending on the duration of exposure (as a comparison exposure levels of 70 to 400 ppm of carbon monoxide cover the same spectrum of illness/death). Concentrations in the range of 60,000 ppm can be immediately fatal, while toxic effects can present following prolonged exposure to concentrations well under 1,000 ppm. "A TLV–TWA of 1 ppm (3.89 mg/m3) is recommended for occupational exposure to methyl bromide"-ACGIH 8 hour time weighted average. Immediately Dangerous To Life or Health Concentration by NIOSH: "The revised IDLH for methyl bromide is 250 ppm based on acute inhalation toxicity data in humans Clarke et al. 1945. This may be a conservative value due to the lack of relevant acute toxicity data for workers exposed to concentrations above 220 ppm. Note: NIOSH recommends as part of its carcinogen policy that the "most protective" respirators be worn for methyl bromide at any detectable concentration." Detectable concentration by Drager Tube is 0.5 ppm. Respiratory, kidney, and neurological effects are of the greatest concern. Treatment of wood packaging requires a concentration of up to 16,000 ppm. NIOSH considers methyl bromide to be a potential occupational carcinogen as defined by the OSHA carcinogen policy 29 CFR 1990. "Methyl bromide showed a significant dose-response relationship with prostate cancer risk." Excessive exposure Expression of toxicity following exposure may involve a latent period of several hours, followed by signs such as nausea, abdominal pain, weakness, confusion, pulmonary edema, and seizures. Individuals who survive the acute phase often require a prolonged convalescence. Persistent neurological deficits such as asthenia, cognitive impairment, optical atrophy, and paresthesia are frequently present after moderate to severe poisoning. Blood or urine concentrations of inorganic bromide, a<unk>  metabolite, are useful to confirm a diagnosis of poisoning in hospitalized patients or to assist in the forensic investigation of a case of fatal overdosage.
Bromomethane
Chloroethane
Trihalomethane
Perfluoroisobutene
Dichloromethane
Ethanol
Perfluorooctanoic acid
3-Chloropropanoic acid