PMID- 4007306 OWN - NLM STAT- MEDLINE DCOM- 19850820 LR - 20190908 IS - 0272-0590 (Print) IS - 0272-0590 (Linking) VI - 5 IP - 3 DP - 1985 Jun TI - Acute and subchronic toxicity of 2,4-dichlorophenol in CD-1 mice. PG - 478-86 AB - The acute oral LD50 of 2,4-dichlorophenol (2,4-DCP) employing corn oil as vehicle was determined to be 1352 mg/kg for female and 1276 mg/kg for male CD-1 mice. CD-1 mice of both sexes were exposed to 2,4-DCP in drinking water containing 10% Emulphor for 90 days at concentrations of 0.2, 0.6, and 2.0 mg/ml providing theoretical daily doses of 50, 150, and 500 mg/kg. These concentrations resulted in mean daily doses of 50, 143, and 491 mg/kg for females and 40, 114, and 383 mg/kg for males. In both sexes, fluid consumption was lower in the vehicle control group (10% Emulphor) and in the 2,4-DCP treated groups than in the naive controls (deionized water). There were no biologically significant differences in body weight gain between females or males in the vehicle control and experimental groups. No differences were found in terminal organ weights or organ weight ratios in either sex. Hematological differences were observed in males only and included an increase in leukocytes (high dose) and an increase in polymorphonuclears (low dose). Clinical chemistry parameters were altered in females only and included a decrease in creatinine (low dose), an increase in BUN/creatinine ratio (mid dose), and an increase in ALP (high dose). In an assessment of the hepatic microsomal mixed function oxidase system, no significant differences were found in the components of the system, component activity, the kinetics of ethylmorphine N-demethylase, or the metabolism of testosterone.(ABSTRACT TRUNCATED AT 250 WORDS) FAU - Borzelleca, J F AU - Borzelleca JF FAU - Hayes, J R AU - Hayes JR FAU - Condie, L W AU - Condie LW FAU - Egle, J L Jr AU - Egle JL Jr LA - eng PT - Journal Article PT - Research Support, U.S. Gov't, Non-P.H.S. PL - United States TA - Fundam Appl Toxicol JT - Fundamental and applied toxicology : official journal of the Society of Toxicology JID - 8200838 RN - 2577AQ9262 (2,4-Dichlorophenoxyacetic Acid) RN - EC 1.- (Mixed Function Oxygenases) SB - IM MH - 2,4-Dichlorophenoxyacetic Acid/blood/*toxicity MH - Animals MH - Body Weight/drug effects MH - Drinking/drug effects MH - Female MH - Lethal Dose 50 MH - Male MH - Mice MH - Mice, Inbred Strains MH - Microsomes, Liver/enzymology MH - Mixed Function Oxygenases/metabolism MH - Organ Size/drug effects MH - Sex Factors MH - Time Factors EDAT- 1985/06/01 00:00 MHDA- 2001/03/28 10:01 CRDT- 1985/06/01 00:00 PHST- 1985/06/01 00:00 [pubmed] PHST- 2001/03/28 10:01 [medline] PHST- 1985/06/01 00:00 [entrez] AID - 10.1016/0272-0590(85)90095-8 [doi] PST - ppublish SO - Fundam Appl Toxicol. 1985 Jun;5(3):478-86. doi: 10.1016/0272-0590(85)90095-8.