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MSDS  : Uracil, 2-thio-
CAS  : 141-90-2
SYNONYMS  : * Antagothyroid * Antagothyroil * Deracil * 2,3-Dihydro-2-thioxo-4(1H)-pyrimidinone * 6-Hydroxy-2-mercaptopyrimidine * 4-Hydroxy-2(1H)-pyrimidinethione * 2-Mercapto-4-hydroxypyrimidine * 2-Mercapto-4-pyrimidinol * 2-Mercapto-4-pyrimidone * 2-Mercapto-4(1H)-pyrimidinone * 2-Mercaptopyrimid-4-one * Nobilen * 4-Pyrimidinol, 2-mercapto- * 2-Thio-6-oxypyrimidine * 2-Thio-1,3-pyrimidin-4-one * Thiouracil * 2-Thiouracil * 6-Thiouracil * Tiouracyl * TU * 2-TU
*** CHEMICAL IDENTIFICATION ***

RTECS NUMBER : YR1575000
CHEMICAL NAME : Uracil, 2-thio-
CAS REGISTRY NUMBER : 141-90-2
OTHER CAS REGISTRY NOS. : 156-82-1
LAST UPDATED : 199701
DATA ITEMS CITED : 17
MOLECULAR FORMULA : C4-H4-N2-O-S
MOLECULAR WEIGHT : 128.16
WISWESSER LINE NOTATION : T6MYMVJ BUS
COMPOUND DESCRIPTOR : Tumorigen
Drug
Mutagen
Reproductive Effector
Human
SYNONYMS/TRADE NAMES :
* Antagothyroid
* Antagothyroil
* Deracil
* 2,3-Dihydro-2-thioxo-4(1H)-pyrimidinone
* 6-Hydroxy-2-mercaptopyrimidine
* 4-Hydroxy-2(1H)-pyrimidinethione
* 2-Mercapto-4-hydroxypyrimidine
* 2-Mercapto-4-pyrimidinol
* 2-Mercapto-4-pyrimidone
* 2-Mercapto-4(1H)-pyrimidinone
* 2-Mercaptopyrimid-4-one
* Nobilen
* 4-Pyrimidinol, 2-mercapto-
* 2-Thio-6-oxypyrimidine
* 2-Thio-1,3-pyrimidin-4-one
* Thiouracil
* 2-Thiouracil
* 6-Thiouracil
* Tiouracyl
* TU
* 2-TU

*** HEALTH HAZARD DATA ***

** ACUTE TOXICITY DATA **

TYPE OF TEST : LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE : Intraperitoneal
SPECIES OBSERVED : Rodent - rat
DOSE/DURATION : 1500 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
JPETAB Journal of Pharmacology and Experimental Therapeutics. (Williams &
Wilkins Co., 428 E. Preston St., Baltimore, MD 21202) V.1- 1909/10-
Volume(issue)/page/year: 97,478,1949

TYPE OF TEST : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - mouse
DOSE/DURATION : 3900 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
JAPMA8 Journal of the American Pharmaceutical Association, Scientific
Edition. (Washington, DC) V.29-49, 1940-60. For publisher information, see
JPMSAE. Volume(issue)/page/year: 44,56,1955

** OTHER MULTIPLE DOSE TOXICITY DATA **

TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - rat
DOSE/DURATION : 2100 mg/kg/4W-C
TOXIC EFFECTS :
Endocrine - changes in thyroid weight
REFERENCE :
JPETAB Journal of Pharmacology and Experimental Therapeutics. (Williams &
Wilkins Co., 428 E. Preston St., Baltimore, MD 21202) V.1- 1909/10-
Volume(issue)/page/year: 97,349,1949

** TUMORIGENIC DATA **

TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - rat
DOSE/DURATION : 10 gm/kg/14W-C
TOXIC EFFECTS :
Tumorigenic - equivocal tumorigenic agent by RTECS criteria
Endocrine - thyroid weight (goiter)
Tumorigenic - increased incidence of tumors in susceptible strains
REFERENCE :
CANCAR Cancer (Philadelphia). (Lippincott/Harper, Journal Fulfillment
Dept., 2350 Virginia Ave., Hagerstown, MD 21740) V.1- 1948-
Volume(issue)/page/year: 6,111,1953

TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - mouse
DOSE/DURATION : 184 gm/kg/73W-C
TOXIC EFFECTS :
Tumorigenic - neoplastic by RTECS criteria
Liver - tumors
REFERENCE :
PSEBAA Proceedings of the Society for Experimental Biology and Medicine.
(Academic Press, Inc., 1 E. First St., Duluth, MN 55802) V.1- 1903/04-
Volume(issue)/page/year: 113,493,1963

** REPRODUCTIVE DATA **

TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Unreported
SPECIES OBSERVED : Human - woman
DOSE : 484 mg/kg
SEX/DURATION : female 1-26 week(s) after conception
TOXIC EFFECTS :
Reproductive - Specific Developmental Abnormalities - endocrine system
REFERENCE :
LANCAO Lancet. (7 Adam St., London WC2N 6AD, UK) V.1- 1823-
Volume(issue)/page/year: 1,1281,1953

TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Unreported
SPECIES OBSERVED : Human - woman
DOSE : 924 mg/kg
SEX/DURATION : female 26-41 week(s) after conception
TOXIC EFFECTS :
Reproductive - Specific Developmental Abnormalities - Central Nervous System
Reproductive - Specific Developmental Abnormalities - craniofacial
(including nose and tongue)
Reproductive - Effects on Newborn - viability index (e.g., # alive at day 4
per # born alive)
REFERENCE :
JCENA4 Journal of Clinical Endocrinology. (Springfield, IL) V.1-11,
1941-51. For publisher information, see JCEMAZ. Volume(issue)/page/year:
7,767,1947

TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - rat
DOSE : 1600 mg/kg
SEX/DURATION : female 1-16 day(s) after conception
TOXIC EFFECTS :
Reproductive - Specific Developmental Abnormalities - musculoskeletal system
REFERENCE :
ENDOAO Endocrinology (Baltimore). (Williams & Wilkins Co., 428 E. Preston
St., Baltimore, MD 21203) V.1- 1917- Volume(issue)/page/year:
45,389,1949

TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - rat
DOSE : 22750 mg/kg
SEX/DURATION : female 91 day(s) pre-mating
TOXIC EFFECTS :
Reproductive - Specific Developmental Abnormalities - endocrine system
Reproductive - Effects on Newborn - growth statistics (e.g.%, reduced weight
gain)
REFERENCE :
ANREAK Anatomical Record. (Alan R. Liss, Inc., 41 E. 11th St., New York, NY
10003) V.1- 1906/08- Volume(issue)/page/year: 109,318,1951

** MUTATION DATA **

TYPE OF TEST : Phage inhibition capacity
TEST SYSTEM : Bacteria - Escherichia coli
DOSE/DURATION : 100 mmol/L
REFERENCE :
MDMIAZ Medycyna Doswiadczalna i Mikrobiologia. For English translation, see
EXMMAV. (Ars Polona, POB 1001, 00-068 Warsaw 1, Poland) V.1- 1949-
Volume(issue)/page/year: 31,11,1979

*** REVIEWS ***

IARC Cancer Review:Animal Limited Evidence
IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals
to Man. (WHO Publications Centre USA, 49 Sheridan Ave., Albany, NY 12210)
V.1- 1972- Volume(issue)/page/year: 7,85,1974

IARC Cancer Review:Human No Adequate Data
IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals
to Man. (WHO Publications Centre USA, 49 Sheridan Ave., Albany, NY 12210)
V.1- 1972- Volume(issue)/page/year: 7,85,1974

IARC Cancer Review:Group 3
IMSUDL IARC Monographs, Supplement. (WHO Publications Centre USA, 49
Sheridan Ave., Albany, NY 12210) No.1- 1979- Volume(issue)/page/year:
7,56,1987

TOXICOLOGY REVIEW
ADVPA3 Advances in Pharmacology. (New York, NY) V.1-6, 1962-68. For
publisher information, see AVPCAQ. Volume(issue)/page/year: 4,263,1966

*** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA ***

NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA :
NOES - National Occupational Exposure Survey (1983)
NOES Hazard Code - E0277
No. of Facilities: 6 (estimated)
No. of Industries: 2
No. of Occupations: 2
No. of Employees: 1776 (estimated)
No. of Female Employees: 634 (estimated)

*** STATUS IN U.S. ***

EPA GENETOX PROGRAM 1988, Inconclusive: D melanogaster Sex-linked lethal

EPA TSCA Section 8(b) CHEMICAL INVENTORY


*** END OF RECORD ***
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