National Toxicology Program

National Toxicology Program
https://ntp.niehs.nih.gov/go/8224

Target Organs and Levels of Evidence for TR-071

Bioassay of L-Tryptophan for Possible Carcinogenicity (CASRN 73-22-3)

Chemical (Study Title)
CASRN
Peer Review DatePrimary UsesRoute/Exposure LevelsStudy Laboratory
L-Tryptophan
73-22-3
03/07/1978An essential amino acid for humans found in many foods, medical uses as dietary supplement (HSDB 1990). Associated with tobacco: reported either as a natural component of tobacco, pyrolysis product (in tobacco smoke), or additive for one or more types of tobacco products.Dosed-Feed
0,25000,50000 PPM/35 PER GROUP
Southern Research Institute

Levels of Evidence

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


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