National Toxicology Program

National Toxicology Program
https://ntp.niehs.nih.gov/go/7116

Target Organs and Levels of Evidence for TR-141

Bioassay of 1-Phenyl-3-methyl-5-pyrazolone for Possible Carcinogenicity (CASRN 89-25-8)

Chemical (Study Title)
CASRN
Peer Review DatePrimary UsesRoute/Exposure LevelsStudy Laboratory
1-Phenyl-3-methyl-5-pyrazolone
89-25-8
06/29/1978Intermediate for dyes and drugs; lab reagent; used in hair dyeDosed-Feed
R: 0,2500,5000, M: 0,7500,15000 PPM/50 PER GROUP
Litton Bionetics, Inc.

Levels of Evidence

Male Rats: Negative
Female Rats: Negative
Male Mice: Negative
Female Mice: Negative


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