*** CHEMICAL IDENTIFICATION ***

RTECS NUMBER            : GU1775000
CHEMICAL NAME           : 1,3-Cyclobutanedione, 2,2,4,4-tetramethyl-
CAS REGISTRY NUMBER     : 933-52-8
LAST UPDATED            : 199701
DATA ITEMS CITED        : 2
MOLECULAR FORMULA       : C8-H12-O2
MOLECULAR WEIGHT        : 140.20
WISWESSER LINE NOTATION : L4V CVTJ B1 B1 D1 D1
COMPOUND DESCRIPTOR     : Tumorigen
SYNONYMS/TRADE NAMES :
   * Tetramethylcyclobuta-1,3-dione
   * Tetramethyl-1,3-cyclobutanedione
 
                       *** HEALTH HAZARD DATA ***
 
                          ** TUMORIGENIC DATA **
 
TYPE OF TEST            : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE       : Subcutaneous
SPECIES OBSERVED        : Rodent - mouse
DOSE/DURATION           : 308 mg/kg/77W-I
TOXIC EFFECTS :
   Tumorigenic - neoplastic by RTECS criteria
   Tumorigenic - tumors at site of application
REFERENCE :
   JNCIAM Journal of the National Cancer Institute.  (Washington, DC)  V.1-60,
   1940-78.  For publisher information, see JJIND8.  Volume(issue)/page/year:
   46,143,1971

                          *** STATUS IN U.S. ***
 
   EPA TSCA Section 8(b) CHEMICAL INVENTORY

 
                            *** END OF RECORD ***