*** CHEMICAL IDENTIFICATION *** RTECS NUMBER : MU3950000 CHEMICAL NAME : Hydantoin, 1-nitroso- CAS REGISTRY NUMBER : 42579-28-2 LAST UPDATED : 199410 DATA ITEMS CITED : 4 MOLECULAR FORMULA : C3-H3-N3-O3 MOLECULAR WEIGHT : 129.09 COMPOUND DESCRIPTOR : Tumorigen Mutagen SYNONYMS/TRADE NAMES : * NHYD * 1-Nitrosohydantoin *** HEALTH HAZARD DATA *** ** ACUTE TOXICITY DATA ** TYPE OF TEST : LD50 - Lethal dose, 50 percent kill ROUTE OF EXPOSURE : Intraperitoneal SPECIES OBSERVED : Rodent - rat DOSE/DURATION : 470 mg/kg TOXIC EFFECTS : Details of toxic effects not reported other than lethal dose value REFERENCE : JJIND8 JNCI, Journal of the National Cancer Institute. (Washington, DC) V.61-79, 1978-87. For publisher information, see JNCIEQ. Volume(issue)/page/year: 62,1523,1979 ** TUMORIGENIC DATA ** TYPE OF TEST : TDLo - Lowest published toxic dose ROUTE OF EXPOSURE : Oral SPECIES OBSERVED : Rodent - rat DOSE/DURATION : 5900 mg/kg/52W-I TOXIC EFFECTS : Tumorigenic - neoplastic by RTECS criteria Gastrointestinal - tumors Blood - lymphoma, including Hodgkin's disease REFERENCE : JJIND8 JNCI, Journal of the National Cancer Institute. (Washington, DC) V.61-79, 1978-87. For publisher information, see JNCIEQ. Volume(issue)/page/year: 62,1523,1979 ** MUTATION DATA ** TYPE OF TEST : Mutation in microorganisms TEST SYSTEM : Bacteria - Salmonella typhimurium DOSE/DURATION : 12 umol/L/48H REFERENCE : MUREAV Mutation Research. (Elsevier Science Pub. B.V., POB 211, 1000 AE Amsterdam, Netherlands) V.1- 1964- Volume(issue)/page/year: 48,131,1977 *** STATUS IN U.S. *** EPA GENETOX PROGRAM 1988, Positive: Histidine reversion-Ames test *** END OF RECORD ***