title: Six month inhalation exposures of rats and guinea pigs to aluminum chlorhydrate.
abstract: Groups of rats and guinea pigs were exposed, by inhalation, to 0.25, 2.5, and 25 mg/m3 of aluminum chlorhydrate (ACH) for six months to study the effects of a common component of antiperspirants. Similar groups of animals of both species exposed to clean air served as controls. The ACH was generated as a particulate dust using a Wright dust feed mechanism. After six months of exposure, animals were sacrificed. Decreases in body weight were seen in rats exposed to 25 mg/m3 of ACH. Marked increases in lung weights and significant increases in lung to body weight ratios were seen in rats and guinea pigs exposed to 25 mg/m3 of ACH. The lungs of all rats and guinea pigs showed significant dose-related increases in aluminum accumulation when exposed to either 0.25, 2.5, or 25 mg/m3 of ACH. The lungs of all rats and guinea pigs exposed to either 2.5 or 25 mg/m3 of ACH contained exposure-related granulomatous reactions characterized by giant vacuoled macrophages containing basophilic material in association with eosinophilic cellular debris.
mesh_terms: D000336:Aerosols; D000535:Aluminum / Q000378:metabolism / Q000633:toxicity*; D000818:Animals; D001835:Body Weight / Q000187:drug effects; D005260:Female; D006168:Guinea Pigs; D008168:Lung / Q000473:pathology; D008297:Male; D009929:Organ Size / Q000187:drug effects; D010316:Particle Size; D011208:Powders; D051381:Rats; D011916:Rats, Inbred F344; D013997:Time Factors
chemical_list: D000336:Aerosols; D011208:Powders; D000535:Aluminum