*** CHEMICAL IDENTIFICATION ***

RTECS NUMBER            : EK4430000
CHEMICAL NAME           : Butane, 2-methyl-
CAS REGISTRY NUMBER     : 78-78-4
OTHER CAS REGISTRY NOS. : 68923-44-4
                          92046-46-3
LAST UPDATED            : 199710
DATA ITEMS CITED        : 10
MOLECULAR FORMULA       : C5-H12
MOLECULAR WEIGHT        : 72.17
WISWESSER LINE NOTATION : 2Y1&1
SYNONYMS/TRADE NAMES :
   * Ethyldimethylmethane
   * Isoamylhydride
   * Isopentane
   * 2-Methylbutane
   * 1,1,2-Trimethylethane
 
                       *** HEALTH HAZARD DATA ***
 
                        ** ACUTE TOXICITY DATA **
 
TYPE OF TEST            : LCLo - Lowest published lethal concentration
ROUTE OF EXPOSURE       : Inhalation
SPECIES OBSERVED        : Rodent - mouse
DOSE/DURATION           : 419 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
 
                 ** OTHER MULTIPLE DOSE TOXICITY DATA **
 
TYPE OF TEST            : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE       : Oral
SPECIES OBSERVED        : Rodent - rat
DOSE/DURATION           : 10 gm/kg/4W-I
TOXIC EFFECTS :
   Nutritional and Gross Metabolic - weight loss or decreased weight gain
   Related to Chronic Data - death
REFERENCE :
   TIHEEC Toxicology and Industrial Health.  (Princeton Scientific Pub. Co.,
   POB 2155, Princeton, NJ 08540)  V.1-    1985-  Volume(issue)/page/year:
   1(3),67,1985

                    *** OCCUPATIONAL EXPOSURE LIMITS ***
 
   OEL-DENMARK:TWA 500 ppm (1500 mg/m3) 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 - 54246
       No. of Facilities: 197 (estimated)
       No. of Industries: 6
       No. of Occupations: 9
       No. of Employees: 21748 (estimated)
   
   NOES - National Occupational Exposure Survey (1983)
     NOES Hazard Code - 54246
       No. of Facilities: 132 (estimated)
       No. of Industries: 5
       No. of Occupations: 13
       No. of Employees: 6605 (estimated)
       No. of Female Employees: 1247 (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 ***