Print Email Facebook Twitter Inhalation toxicity of acetaldehyde in rats. I. Acute and subacute studies Title Inhalation toxicity of acetaldehyde in rats. I. Acute and subacute studies Author Centraal Instituut voor Voedingsonderzoek TNO Appelman, L.M. Woutersen, R.A. Feron, V.J. Publication year 1982 Abstract The 4-h LC50 of acetaldehyde in rats was determined and found to be 13,300 ppm (24.0 g/m3 air). In a 4-week study groups of 10 male and 10 female rats were exposed to 0, 400, 1000, 2200 or 5000 ppm acetaldehyde for 6 h/day, 5 days/week. Treatment-related changes observed at the 5000 ppm level included dyspnoea and excitation during the first 30 min of each exposure, yellow-brown fur, severe growth retardation, more neutrophils and less lymphocytes in the blood, a reduced production of urine with a high density, increased lung weights, and severe degenerative, hyperplastic and metaplastic changes of the nasal, laryngeal and tracheal epithelium. Major lesions seen at 1000 and 2200 ppm comprised growth retardation and an increased production of urine in males, slight to moderate degeneration with or without hyper- and metaplasia of the nasal epithelium, and only at 2200 ppm, minimal epithelial changes in the larynx and trachea. The only change observed at the 400 ppm level that could be attributed to acetaldehyde was slight degeneration of the nasal olfactory epithelium seen as loss of microvilli and thinning and disarrangement of the layer of epithelial cells. Chemicals/CAS: acetaldehyde, 75-07-0; Acetaldehyde, 75-07-0; Gases. Subject AcetaldehydeIrritant agentAnimal experimentCarcinogenicityCentral nervous systemDrug responseDrug toxicityIntoxicationNose mucosaOlfactory systemRatRespiratory systemRespiratory tract diseaseAnimalBloodDose-Response Relationship, DrugEpitheliumFemaleGasesHyperplasiaLethal Dose 50MaleNoseRatsRats, Inbred StrainsRespiratory SystemSupport, Non-U.S. Gov'tTime Factors To reference this document use: http://resolver.tudelft.nl/uuid:2c15ea9d-2b00-4b40-aa15-bd0555fb3683 DOI https://doi.org/10.1016/0300-483x(82)90068-3 TNO identifier 229194 ISSN 0300-483X Source Toxicology, 23 (23), 293-307 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.