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MSDS  : Uracil, 6-propyl-2-thio-
CAS  : 51-52-5
SYNONYMS  : * 2,3-Dihydro-6-propyl-2-thioxo-4(1H)-pyrimidinone * 2-Mercapto-4-hydroxy-6-n-propylpyrimidine * 2-Mercapto-6-propyl-4-pyrimidone * 2-Mercapto-6-propylpyrimid-4-one * Procasil * Propacil * Propilthiouracil * 6-Propil-tiouracile * Propycil * 6-Propyl-2-thio-2,4(1H,3H)pyrimidinedione * Propyl-thiorist * Propyl-thiorit * Propylthiouracil * 4-Propyl-2-thiouracil * 6-Propylthiouracil * 6-Propyl-2-thiouracil * 6-n-Propylthiouracil * 6-n-Propyl-2-thiouracil * Prothycil * Propyl-thyracil * Propythiouracil * Prothiucil * Prothiurone * Prothyran * Protiural * PTU (thyreostatic) * 4(1H)-Pyrimidinone, 2,3-dihydro-6-propyl-2-thioxo- * 2-Thio-4-oxo-6-propyl-1,3-pyrimidine * 2-Thio-6-propyl-1,3-pyrimidin-4-one * 6-Thio-4-propyluracil * Thiuragyl * Thyreostat II
*** CHEMICAL IDENTIFICATION ***

RTECS NUMBER : YR1400000
CHEMICAL NAME : Uracil, 6-propyl-2-thio-
CAS REGISTRY NUMBER : 51-52-5
LAST UPDATED : 199706
DATA ITEMS CITED : 40
MOLECULAR FORMULA : C7-H10-N2-O-S
MOLECULAR WEIGHT : 170.25
WISWESSER LINE NOTATION : T6MYMVJ BUS F3
COMPOUND DESCRIPTOR : Tumorigen
Drug
Mutagen
Reproductive Effector
Human
SYNONYMS/TRADE NAMES :
* 2,3-Dihydro-6-propyl-2-thioxo-4(1H)-pyrimidinone
* 2-Mercapto-4-hydroxy-6-n-propylpyrimidine
* 2-Mercapto-6-propyl-4-pyrimidone
* 2-Mercapto-6-propylpyrimid-4-one
* Procasil
* Propacil
* Propilthiouracil
* 6-Propil-tiouracile
* Propycil
* 6-Propyl-2-thio-2,4(1H,3H)pyrimidinedione
* Propyl-thiorist
* Propyl-thiorit
* Propylthiouracil
* 4-Propyl-2-thiouracil
* 6-Propylthiouracil
* 6-Propyl-2-thiouracil
* 6-n-Propylthiouracil
* 6-n-Propyl-2-thiouracil
* Prothycil
* Propyl-thyracil
* Propythiouracil
* Prothiucil
* Prothiurone
* Prothyran
* Protiural
* PTU (thyreostatic)
* 4(1H)-Pyrimidinone, 2,3-dihydro-6-propyl-2-thioxo-
* 2-Thio-4-oxo-6-propyl-1,3-pyrimidine
* 2-Thio-6-propyl-1,3-pyrimidin-4-one
* 6-Thio-4-propyluracil
* Thiuragyl
* Thyreostat II

*** HEALTH HAZARD DATA ***

** ACUTE TOXICITY DATA **

TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Human - man
DOSE/DURATION : 42857 ug/kg/10D-I
TOXIC EFFECTS :
Kidney, Ureter, Bladder - changes in tubules (including acute renal failure,
acute tubular necrosis)
Kidney, Ureter, Bladder - interstitial nephritis
Kidney, Ureter, Bladder - urine volume decreased
REFERENCE :
AJKDDP American Journal of Kidney Diseases. (Grune & Stratton, Inc.,
Journal Subscription Dept., POB 6280, Duluth, MN 55806) V.1- 1981-
Volume(issue)/page/year: 24,575,1994

TYPE OF TEST : LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Human - woman
DOSE/DURATION : 480 mg/kg/9W-I
TOXIC EFFECTS :
Vascular - other changes
Blood - agranulocytosis
REFERENCE :
SMJOAV Southern Medical Journal. (Southern Medical Assoc., POB 2446,
Birmingham, AL 35205) V.1- 1908- Volume(issue)/page/year: 75,1297,1982

TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Human - child
DOSE/DURATION : 900 mg/kg/60D-I
TOXIC EFFECTS :
Liver - hepatitis (hepatocellular necrosis), diffuse
Liver - jaundice, other or unclassified
REFERENCE :
AIMEAS Annals of Internal Medicine. (American College of Physicians, 4200
Pine St., Philadelphia, PA 19104) V.1- 1927- Volume(issue)/page/year:
82,228,1975

TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Human - woman
DOSE/DURATION : 900 mg/kg/21W-I
TOXIC EFFECTS :
Liver - other changes
REFERENCE :
AIMDAP Archives of Internal Medicine. (AMA, 535 N. Dearborn St., Chicago,
IL 60610) V.1- 1908- Volume(issue)/page/year: 140,1184,1980

TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Human - child
DOSE/DURATION : 165 mg/kg/2W-I
TOXIC EFFECTS :
Liver - hepatitis (hepatocellular necrosis), diffuse
REFERENCE :
DICPBB Drug Intelligence and Clinical Pharmacy. (POB 42435, Cincinnati, OH
45242) V.3- 1969- Volume(issue)/page/year: 19,669,1985

TYPE OF TEST : LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Human - woman
DOSE/DURATION : 84 mg/kg/2W-I
TOXIC EFFECTS :
Liver - hepatitis (hepatocellular necrosis), diffuse
REFERENCE :
AIMDAP Archives of Internal Medicine. (AMA, 535 N. Dearborn St., Chicago,
IL 60610) V.1- 1908- Volume(issue)/page/year: 142,838,1982

TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Human - man
DOSE/DURATION : 116 mg/kg/11W-I
TOXIC EFFECTS :
Liver - other changes
REFERENCE :
AIMDAP Archives of Internal Medicine. (AMA, 535 N. Dearborn St., Chicago,
IL 60610) V.1- 1908- Volume(issue)/page/year: 135,319,1975

TYPE OF TEST : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - rat
DOSE/DURATION : 1250 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
NATUAS Nature. (Nature Subscription Dept., POB 1018, Manasguan, NJ 08736)
V.1- 1869- Volume(issue)/page/year: 157,659,1946

TYPE OF TEST : LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE : Intraperitoneal
SPECIES OBSERVED : Rodent - rat
DOSE/DURATION : 400 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 : LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE : Unreported
SPECIES OBSERVED : Rodent - rat
DOSE/DURATION : 750 ug/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
NIIRDN Drugs in Japan (Ethical Drugs). (Yakugyo Jiho Co., Ltd., Tokyo,
Japan) Volume(issue)/page/year: 6,732,1982

TYPE OF TEST : LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE : Unreported
SPECIES OBSERVED : Rodent - mouse
DOSE/DURATION : 750 ug/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
NIIRDN Drugs in Japan (Ethical Drugs). (Yakugyo Jiho Co., Ltd., Tokyo,
Japan) Volume(issue)/page/year: 6,732,1982

** OTHER MULTIPLE DOSE TOXICITY DATA **

TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - rat
DOSE/DURATION : 910 mg/kg/13W-I
TOXIC EFFECTS :
Endocrine - changes in thyroid weight
Blood - changes in serum composition (e.g. TP, bilirubin, cholesterol)
Biochemical - Enzyme inhibition, induction, or change in blood or tissue
levels - transaminases
REFERENCE :
TXAPA9 Toxicology and Applied Pharmacology. (Academic Press, Inc., 1 E.
First St., Duluth, MN 55802) V.1- 1959- Volume(issue)/page/year:
36,49,1976

TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Unreported
SPECIES OBSERVED : Rodent - rat
DOSE/DURATION : 18200 mg/kg/2W-I
TOXIC EFFECTS :
Endocrine - other changes
Endocrine - changes in thyroid weight
Blood - changes in serum composition (e.g. TP, bilirubin, cholesterol)
REFERENCE :
PHTOEH Pharmacology and Toxicology (Copenhagen). (Munksgaard International
Pub., POB 2148, DK-1016 Copenhagen K, Denmark) V.60- 1987-
Volume(issue)/page/year: 73(Suppl 2),113,1993

TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Mammal - cat
DOSE/DURATION : 1974 mg/kg/25W-I
TOXIC EFFECTS :
Blood - other changes
Immunological Including Allergic - uncharacterized
Nutritional and Gross Metabolic - weight loss or decreased weight gain
REFERENCE :
TXCYAC Toxicology. (Elsevier Scientific Pub. Ireland, Ltd., POB 85,
Limerick, Ireland) V.1- 1973- Volume(issue)/page/year: 114,155,1996

** TUMORIGENIC DATA **

TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - mouse
DOSE/DURATION : 600 gm/kg/73W-C
TOXIC EFFECTS :
Tumorigenic - equivocal tumorigenic agent by RTECS criteria
Endocrine - 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: 112,365,1963

TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - guinea pig
DOSE/DURATION : 37 gm/kg/2Y-C
TOXIC EFFECTS :
Tumorigenic - neoplastic by RTECS criteria
Endocrine - thyroid tumors
REFERENCE :
GROWAH Growth. (Southern Bio-Research Institute, Florida Southern College,
Lakeland, FL 33802) V.1- 1937- Volume(issue)/page/year: 27,305,1963

TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - hamster
DOSE/DURATION : 653 gm/kg/70W-C
TOXIC EFFECTS :
Tumorigenic - Carcinogenic by RTECS criteria
Endocrine - thyroid tumors
REFERENCE :
CANCAR Cancer (Philadelphia). (Lippincott/Harper, Journal Fulfillment
Dept., 2350 Virginia Ave., Hagerstown, MD 21740) V.1- 1948-
Volume(issue)/page/year: 21,952,1968

** REPRODUCTIVE DATA **

TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Human - woman
DOSE : 1818 mg/kg
SEX/DURATION : female 33 day(s) pre-mating
female 1-39 week(s) after conception
TOXIC EFFECTS :
Reproductive - Specific Developmental Abnormalities - endocrine system
Reproductive - Effects on Newborn - other neonatal measures or effects
REFERENCE :
JAMAAP JAMA, Journal of the American Medical Association. (AMA, 535 N.
Dearborn St., Chicago, IL 60610) V.1- 1883- Volume(issue)/page/year:
159,848,1955

TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Human - woman
DOSE : 1092 mg/kg
SEX/DURATION : female 14-40 week(s) after conception
TOXIC EFFECTS :
Reproductive - Specific Developmental Abnormalities - endocrine system
Reproductive - Effects on Newborn - other neonatal measures or effects
REFERENCE :
AIMEAS Annals of Internal Medicine. (American College of Physicians, 4200
Pine St., Philadelphia, PA 19104) V.1- 1927- Volume(issue)/page/year:
46,145,1957

TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - rat
DOSE : 4600 mg/kg
SEX/DURATION : female 70 day(s) pre-mating
female 1-22 day(s) after conception
TOXIC EFFECTS :
Reproductive - Specific Developmental Abnormalities - endocrine system
Reproductive - Effects on Newborn - stillbirth
Reproductive - Effects on Newborn - live birth index (measured after birth)
REFERENCE :
PIAIA9 Proceedings of the Iowa Academy of Science. (Iowa Academy of
Science, Exec. Dir., Univ. of Northern Iowa, Cedar Falls, IA 50613) V.1-
1887/93- Volume(issue)/page/year: 69,624,1962

TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - rat
DOSE : 400 mg/kg
SEX/DURATION : female 20-21 day(s) after conception
TOXIC EFFECTS :
Reproductive - Effects on Embryo or Fetus - fetotoxicity (except death,
e.g., stunted fetus)
Reproductive - Specific Developmental Abnormalities - endocrine system
REFERENCE :
ANREAK Anatomical Record. (Alan R. Liss, Inc., 41 E. 11th St., New York, NY
10003) V.1- 1906/08- Volume(issue)/page/year: 198,637,1980

TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - rat
DOSE : 240 mg/kg
SEX/DURATION : female 10-21 day(s) after conception
TOXIC EFFECTS :
Reproductive - Specific Developmental Abnormalities - Central Nervous System
Reproductive - Effects on Newborn - behavioral
REFERENCE :
NETEEC Neurotoxicology and Teratology. (Pergamon Press Inc., Maxwell House,
Fairview Park, Elmsford, NY 10523) V.9- 1987- Volume(issue)/page/year:
11,251,1989

TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - rat
DOSE : 500 mg/kg
SEX/DURATION : female 18-22 day(s) after conception
lactating female 20 day(s) post-birth
TOXIC EFFECTS :
Reproductive - Specific Developmental Abnormalities - endocrine system
Reproductive - Specific Developmental Abnormalities - urogenital system
Reproductive - Effects on Newborn - physical
REFERENCE :
JOENAK Journal of Endocrinology. (Biochemical Soc. Book Depot, POB 32,
Commerce Way, Colchester, Essex CO2 8HP, UK) V.1- 1939-
Volume(issue)/page/year: 62,213,1974

TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - rat
DOSE : 1050 mg/kg
SEX/DURATION : lactating female 21 day(s) post-birth
TOXIC EFFECTS :
Reproductive - Effects on Newborn - weaning or lactation index (e.g., #
alive at weaning per # alive at day 4)
Reproductive - Effects on Newborn - growth statistics (e.g.%, reduced weight
gain)
REFERENCE :
PIAIA9 Proceedings of the Iowa Academy of Science. (Iowa Academy of
Science, Exec. Dir., Univ. of Northern Iowa, Cedar Falls, IA 50613) V.1-
1887/93- Volume(issue)/page/year: 69,624,1962

TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - rat
DOSE : 10 mL/kg
SEX/DURATION : lactating female 25 day(s) post-birth
TOXIC EFFECTS :
Reproductive - Paternal Effects - testes, epididymis, sperm duct
Reproductive - Paternal Effects - other effects on male
Endocrine - evidence of thyroid hyperfunction
REFERENCE :
JRPFA4 Journal of Reproduction and Fertility. (Biochemical Soc. Book Depot,
POB 32, Commerce Way, Colchester, Essex CO2 8HP, UK) V.1- 1960-
Volume(issue)/page/year: 100,85,1994

TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - rabbit
DOSE : 330 mg/kg
SEX/DURATION : female 11-25 day(s) after conception
TOXIC EFFECTS :
Reproductive - Effects on Embryo or Fetus - fetotoxicity (except death,
e.g., stunted fetus)
Reproductive - Specific Developmental Abnormalities - endocrine system
REFERENCE :
SURGAZ Surgery. (C.V. Mosby Co., 11830 Westline Industrial Dr., St. Louis,
MO 63146) V.1- 1937- Volume(issue)/page/year: 41,619,1957

TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - guinea pig
DOSE : 1470 mg/kg
SEX/DURATION : female 38-58 day(s) after conception
TOXIC EFFECTS :
Reproductive - Effects on Newborn - live birth index (measured after birth)
Reproductive - Specific Developmental Abnormalities - endocrine system
REFERENCE :
ANREAK Anatomical Record. (Alan R. Liss, Inc., 41 E. 11th St., New York, NY
10003) V.1- 1906/08- Volume(issue)/page/year: 115,359,1953

TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Parenteral
SPECIES OBSERVED : Mammal - species unspecified
DOSE : 615 ug/kg
SEX/DURATION : female 29-32 day(s) after conception
TOXIC EFFECTS :
Reproductive - Specific Developmental Abnormalities - endocrine system
REFERENCE :
ANREAK Anatomical Record. (Alan R. Liss, Inc., 41 E. 11th St., New York, NY
10003) V.1- 1906/08- Volume(issue)/page/year: 175,290,1973

** MUTATION DATA **

TYPE OF TEST : Mutation in microorganisms
TEST SYSTEM : Yeast - Saccharomyces cerevisiae
DOSE/DURATION : 1 gm/L
REFERENCE :
CHINAG Chemistry and Industry (London). (Royal Soc. of Chemistry,
Distribution Centre, Blackhorse Rd., Letchworth, Herts SG6 1HN, UK) V.1-
1923- Volume(issue)/page/year: (21),847,1980

TYPE OF TEST : DNA inhibition
TEST SYSTEM : Human Lymphocyte
DOSE/DURATION : 100 mg/L
REFERENCE :
JCEMAZ Journal of Clinical Endocrinology and Metabolism. (Williams &
Wilkins Co., 428 E. Preston St., Baltimore, MD 21202) V.12- 1952-
Volume(issue)/page/year: 43,1406,1976

*** REVIEWS ***

IARC Cancer Review:Animal Sufficient 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: 7,67,1974

IARC Cancer Review:Human Inadequate Evidence
IMSUDL IARC Monographs, Supplement. (WHO Publications Centre USA, 49
Sheridan Ave., Albany, NY 12210) No.1- 1979- Volume(issue)/page/year:
7,329,1987

IARC Cancer Review:Group 2B
IMSUDL IARC Monographs, Supplement. (WHO Publications Centre USA, 49
Sheridan Ave., Albany, NY 12210) No.1- 1979- Volume(issue)/page/year:
7,329,1987

TOXICOLOGY REVIEW
PCNAA8 Pediatric Clinics of North America. (W.B. Saunders Co., W.
Washington Sq., Philadelphia, PA 19105) V.1- 1954-
Volume(issue)/page/year: 8,413,1961

TOXICOLOGY REVIEW
NEJMAG New England Journal of Medicine. (Massachusetts Medical Soc., 10
Shattuck St., Boston, MA 02115) V.198- 1928- Volume(issue)/page/year:
304,538,1981

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

NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA :
NOHS - National Occupational Hazard Survey (1974)
NOHS Hazard Code - 83947
No. of Facilities: 33 (estimated)
No. of Industries: 1
No. of Occupations: 1
No. of Employees: 297 (estimated)

NOES - National Occupational Exposure Survey (1983)
NOES Hazard Code - 83947
No. of Facilities: 330 (estimated)
No. of Industries: 6
No. of Occupations: 12
No. of Employees: 3331 (estimated)
No. of Female Employees: 1666 (estimated)

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

EPA GENETOX PROGRAM 1988, Positive: Carcinogenicity-mouse/rat

EPA TSCA Section 8(b) CHEMICAL INVENTORY

NTP 7th Annual Report on Carcinogens, 1992 : anticipated to be carcinogen


*** END OF RECORD ***
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