title: Inhalation carcinogenicity of alpha halo ethers. I. The acute inhalation toxicity of chloromethyl methyl ether and bis(chloromethyl)ether.
abstract: A range of acute studies were performed with chloromethyl methyl either (CMME) and bis(chloromethyl)ether (BCME), including 14-day LC50's following single seven-hour inhalation exposures. The LC50's for CMME were 55 ppm for rats and 65 ppm for hamsters. The LC50's for BCME were 7 ppm for both species. All animals showed characteristic changes of acute irritation of the respiratory tract manifested by congestion, edema, and hemorrhage. Severe shortening of life span was seen in 30-day exposures of rats to CMME and in all studies with BCME. Incidences of mucosal changes, including atypia, were generally increased in a dose-related manner in both species. The carcinogenicity of BCME in these range finding experiments was demonstrated by a skin cancer in a rat after three exposures and a nasal tumor in a hamster after one exposure to 1 ppm BCME.
mesh_terms: D000818:Animals; D002273:Carcinogens; D002294:Carcinoma, Squamous Cell / Q000139:chemically induced; D006224:Cricetinae; D004305:Dose-Response Relationship, Drug; D004781:Environmental Exposure; D007928:Lethal Dose 50; D008136:Longevity; D008297:Male; D008737:Methyl Chloride / Q000633:toxicity*; D008738:Methyl Ethers / Q000633:toxicity*; D018241:Neuroectodermal Tumors, Primitive, Peripheral / Q000139:chemically induced; D009669:Nose Neoplasms / Q000139:chemically induced; D011230:Precancerous Conditions / Q000139:chemically induced; D051381:Rats; D012140:Respiratory Tract Diseases / Q000139:chemically induced*; D012142:Respiratory Tract Neoplasms / Q000139:chemically induced*; D012878:Skin Neoplasms / Q000139:chemically induced; D013997:Time Factors
chemical_list: D002273:Carcinogens; D008738:Methyl Ethers; D008737:Methyl Chloride