*** CHEMICAL IDENTIFICATION ***

RTECS NUMBER            : YU2750000
CHEMICAL NAME           : Urea, 1,1,3,3-tetramethyl-2-thio-
CAS REGISTRY NUMBER     : 2782-91-4
BEILSTEIN REFERENCE NO. : 1744916
REFERENCE               : 4-04-00-00232 (Beilstein Handbook Reference)
LAST UPDATED            : 199710
DATA ITEMS CITED        : 14
MOLECULAR FORMULA       : C5-H12-N2-S
MOLECULAR WEIGHT        : 132.25
WISWESSER LINE NOTATION : 1N1&YUS&N1&1
COMPOUND DESCRIPTOR     : Tumorigen
                          Drug
                          Mutagen
                          Reproductive Effector
SYNONYMS/TRADE NAMES :
   * NA-101
   * Tetramethylthiourea
   * 1,1,3,3-Tetramethylthiourea
   * TMTU
 
                       *** HEALTH HAZARD DATA ***
 
                        ** ACUTE TOXICITY DATA **
 
TYPE OF TEST            : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE       : Oral
SPECIES OBSERVED        : Rodent - rat
DOSE/DURATION           : 920 mg/kg
TOXIC EFFECTS :
   Details of toxic effects not reported other than lethal dose value
REFERENCE :
   JEPTDQ Journal of Environmental Pathology and Toxicology.  (Park Forest
   South, IL)  V.1-5(3), 1977-81(?).  For publisher information, see JEPOEC.
   Volume(issue)/page/year: 2,889,1979
 
TYPE OF TEST            : LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE       : Oral
SPECIES OBSERVED        : Rodent - mouse
DOSE/DURATION           : 500 mg/kg
TOXIC EFFECTS :
   Details of toxic effects not reported other than lethal dose value
REFERENCE :
   TJADAB Teratology, The International Journal of Abnormal Development. (Alan
   R. Liss, Inc., 41 E. 11th St., New York, NY 10003)  V.1-    1968-
   Volume(issue)/page/year: 23,335,1981
 
TYPE OF TEST            : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE       : Unreported
SPECIES OBSERVED        : Mammal - species unspecified
DOSE/DURATION           : 400 mg/kg
TOXIC EFFECTS :
   Details of toxic effects not reported other than lethal dose value
REFERENCE :
   GTPZAB Gigiena Truda i Professional'nye Zabolevaniya.  Labor Hygiene and
   Occupational Diseases. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR)
   V.1-36, 1957-1992. For publisher information, see MTPEEI
   Volume(issue)/page/year: 17(3),32,1973
 
                          ** TUMORIGENIC DATA **
 
TYPE OF TEST            : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE       : Oral
SPECIES OBSERVED        : Rodent - rat
DOSE/DURATION           : 2373 mg/kg/2Y-C
TOXIC EFFECTS :
   Tumorigenic - Carcinogenic by RTECS criteria
   Endocrine - thyroid tumors
REFERENCE :
   JEPTDQ Journal of Environmental Pathology and Toxicology.  (Park Forest
   South, IL)  V.1-5(3), 1977-81(?).  For publisher information, see JEPOEC.
   Volume(issue)/page/year: 2,889,1979
 
                          ** REPRODUCTIVE DATA **
 
TYPE OF TEST            : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE       : Oral
SPECIES OBSERVED        : Rodent - rat
DOSE                    : 250 mg/kg
SEX/DURATION            : female 12 day(s) after conception
TOXIC EFFECTS :
   Reproductive - Effects on Embryo or Fetus - fetotoxicity (except death,
   e.g., stunted fetus)
REFERENCE :
   TJADAB Teratology, The International Journal of Abnormal Development. (Alan
   R. Liss, Inc., 41 E. 11th St., New York, NY 10003)  V.1-    1968-
   Volume(issue)/page/year: 23,335,1981
 
TYPE OF TEST            : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE       : Administration onto the skin
SPECIES OBSERVED        : Rodent - rat
DOSE                    : 500 mg/kg
SEX/DURATION            : female 11-12 day(s) after conception
TOXIC EFFECTS :
   Reproductive - Effects on Embryo or Fetus - fetal death
REFERENCE :
   TXAPA9 Toxicology and Applied Pharmacology.  (Academic Press, Inc., 1 E.
   First St., Duluth, MN 55802) V.1-    1959-  Volume(issue)/page/year:
   41,35,1977
 
TYPE OF TEST            : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE       : Oral
SPECIES OBSERVED        : Rodent - mouse
DOSE                    : 250 mg/kg
SEX/DURATION            : female 10 day(s) after conception
TOXIC EFFECTS :
   Reproductive - Effects on Embryo or Fetus - fetotoxicity (except death,
   e.g., stunted fetus)
   Reproductive - Specific Developmental Abnormalities - craniofacial
   (including nose and tongue)
   Reproductive - Specific Developmental Abnormalities - musculoskeletal system
REFERENCE :
   TJADAB Teratology, The International Journal of Abnormal Development. (Alan
   R. Liss, Inc., 41 E. 11th St., New York, NY 10003)  V.1-    1968-
   Volume(issue)/page/year: 23,335,1981
 
                            ** MUTATION DATA **
 
TYPE OF TEST            : Mutation test systems - not otherwise specified
TEST SYSTEM             : Human Fibroblast
DOSE/DURATION           : 10 ug/kg
REFERENCE :
   GTPZAB Gigiena Truda i Professional'nye Zabolevaniya.  Labor Hygiene and
   Occupational Diseases. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR)
   V.1-36, 1957-1992. For publisher information, see MTPEEI
   Volume(issue)/page/year: 17(3),32,1973
 
TYPE OF TEST            : Cytogenetic analysis
TEST SYSTEM             : Human Lymphocyte
DOSE/DURATION           : 100 ug/L
REFERENCE :
   CYGEDX Cytology and Genetics (English Translation).  Translation of TGANAK.
   (Allerton Press Inc., 150 Fifth Ave., New York, NY 10011)  V.8-    1974-
   Volume(issue)/page/year: 20(2),55,1986

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

NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA :
   NOHS - National Occupational Hazard Survey (1974)
     NOHS Hazard Code - 82211
       No. of Facilities: 28 (estimated)
       No. of Industries: 2
       No. of Occupations: 5
       No. of Employees: 1954 (estimated)

                          *** STATUS IN U.S. ***
 
   EPA TSCA Section 8(b) CHEMICAL INVENTORY
   
   EPA TSCA Section 8(d) unpublished health/safety studies
   
   EPA TSCA TEST SUBMISSION (TSCATS) DATA BASE, JUNE 1998
   
   NIOSH Analytical Method, 1994: Tetramethyl thiourea, 3505

 
                            *** END OF RECORD ***