*** CHEMICAL IDENTIFICATION ***

RTECS NUMBER            : UD0890000
CHEMICAL NAME           : 1-Propene, 2-methyl-
CAS REGISTRY NUMBER     : 115-11-7
LAST UPDATED            : 199712
DATA ITEMS CITED        : 8
MOLECULAR FORMULA       : C4-H8
MOLECULAR WEIGHT        : 56.12
WISWESSER LINE NOTATION : 1Y1&U1
SYNONYMS/TRADE NAMES :
   * 1,1-Dimethylethene
   * 1,1-Dimethylethylene
   * gamma-Butylene
   * Isobutene
   * Isopropylidenemethylene
   * 2-Methylpropene
   * 2-Methylproylene
 
                       *** HEALTH HAZARD DATA ***
 
                        ** ACUTE TOXICITY DATA **
 
TYPE OF TEST            : LC50 - Lethal concentration, 50 percent kill
ROUTE OF EXPOSURE       : Inhalation
SPECIES OBSERVED        : Rodent - rat
DOSE/DURATION           : 620 gm/m3/4H
TOXIC EFFECTS :
   Details of toxic effects not reported other than lethal dose value
REFERENCE :
   FATOAO Farmakologiya i Toksikologiya (Moscow).  For English translation, see
   PHTXA6 and RPTOAN. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.2-   
   1939-  Volume(issue)/page/year: 30,102,1967
 
TYPE OF TEST            : LC50 - Lethal concentration, 50 percent kill
ROUTE OF EXPOSURE       : Inhalation
SPECIES OBSERVED        : Rodent - mouse
DOSE/DURATION           : 415 gm/m3/2H
TOXIC EFFECTS :
   Details of toxic effects not reported other than lethal dose value
REFERENCE :
   FATOAO Farmakologiya i Toksikologiya (Moscow).  For English translation, see
   PHTXA6 and RPTOAN. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.2-   
   1939-  Volume(issue)/page/year: 30,102,1967

                    *** OCCUPATIONAL EXPOSURE LIMITS ***
 
   OEL-RUSSIA:STEL 100 mg/m3 JAN 1993

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

NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA :
   NOHS - National Occupational Hazard Survey (1974)
     NOHS Hazard Code - 81854
       No. of Facilities: 432 (estimated)
       No. of Industries: 13
       No. of Occupations: 22
       No. of Employees: 5502 (estimated)
   
   NOES - National Occupational Exposure Survey (1983)
     NOES Hazard Code - 81854
       No. of Facilities: 942 (estimated)
       No. of Industries: 17
       No. of Occupations: 16
       No. of Employees: 7002 (estimated)
       No. of Female Employees: 982 (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   EPA TSCA Section 8(d) unpublished health/safety studies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

 
                            *** END OF RECORD ***