*** CHEMICAL IDENTIFICATION ***

RTECS NUMBER            : TZ4300000
CHEMICAL NAME           : Propane, 2-methyl-
CAS REGISTRY NUMBER     : 75-28-5
LAST UPDATED            : 199712
DATA ITEMS CITED        : 13
MOLECULAR FORMULA       : C4-H10
MOLECULAR WEIGHT        : 58.14
WISWESSER LINE NOTATION : 1Y1&1
SYNONYMS/TRADE NAMES :
   * A 31 (hydrocarbon)
   * 1,1-Dimethylethane
   * 2-Methylpropane
   * R 600a
   * Trimethylmethane
 
                       *** 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           : 57 pph/15M
TOXIC EFFECTS :
   Behavioral - tremor
   Behavioral - convulsions or effect on seizure threshold
   Lungs, Thorax, or Respiration - respiratory depression
REFERENCE :
   HUTODJ Human Toxicology.  (Macmillan Press Ltd., Houndmills, Basingstoke,
   Hants., RG 21 2XS, UK) V.1-    1981-  Volume(issue)/page/year: 1,239,1982
 
TYPE OF TEST            : LCLo - Lowest published lethal concentration
ROUTE OF EXPOSURE       : Inhalation
SPECIES OBSERVED        : Rodent - mouse
DOSE/DURATION           : 1041 gm/m3/2H
TOXIC EFFECTS :
   Behavioral - excitement
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: 58,74,1936

                              *** REVIEWS ***
 
   TOXICOLOGY REVIEW
   FAZMAE Fortschritte der Arzneimittelforschung.  Progress in Drug Research.
   (Birkhauser Boston, Inc., c/o Springer-Verlag New York, 44 Hartz Way,
   Secaucus, NJ 07094)  V.1-    1959-  Volume(issue)/page/year: 18,365,1974

                    *** OCCUPATIONAL EXPOSURE LIMITS ***
 
   OEL-GERMANY:TWA 1000 ppm (2350 mg/m3) JAN 1993
   
   OEL-SWITZERLAND:TWA 800 ppm (1900 mg/m3) JAN 1993
   
   OEL-UNITED KINGDOM:TWA 600 ppm (1430 mg/m3);STEL 750 ppm JAN 1993
   
   OEL IN BULGARIA, COLOMBIA, JORDAN, KOREA check ACGIH TLV
   
   OEL IN NEW ZEALAND, SINGAPORE, VIETNAM check ACGIH TLV

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

NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA :
   NOHS - National Occupational Hazard Survey (1974)
     NOHS Hazard Code - 81851
       No. of Facilities: 118992 (estimated)
       No. of Industries: 360
       No. of Occupations: 199
       No. of Employees: 1193478 (estimated)
   
   NOES - National Occupational Exposure Survey (1983)
     NOES Hazard Code - 81851
       No. of Facilities: 110810 (estimated)
       No. of Industries: 377
       No. of Occupations: 233
       No. of Employees: 1795168 (estimated)
       No. of Female Employees: 556159 (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 ***