*** CHEMICAL IDENTIFICATION ***

RTECS NUMBER            : PA7525000
CHEMICAL NAME           : Methane, dibromodifluoro-
CAS REGISTRY NUMBER     : 75-61-6
BEILSTEIN REFERENCE NO. : 1732515
REFERENCE               : 4-01-00-00080 (Beilstein Handbook Reference)
LAST UPDATED            : 199712
DATA ITEMS CITED        : 28
MOLECULAR FORMULA       : C-Br2-F2
MOLECULAR WEIGHT        : 209.83
WISWESSER LINE NOTATION : FXFEE
SYNONYMS/TRADE NAMES :
   * Difluorodibromomethane
   * Freon 12-B2
   * Halon 1202
 
                       *** HEALTH HAZARD DATA ***
 
                        ** ACUTE TOXICITY DATA **
 
TYPE OF TEST            : LC50 - Lethal concentration, 50 percent kill
ROUTE OF EXPOSURE       : Inhalation
SPECIES OBSERVED        : Rodent - mouse
DOSE/DURATION           : 140 gm/m3/2H
TOXIC EFFECTS :
   Behavioral - rigidity (including catalepsy)
   Liver - other changes
   Kidney, Ureter, Bladder - other changes
REFERENCE :
   TLSMA6 Trudy Leningradskogo Sanitarno-Gigienicheskogo Meditsinskogo
   Instituta.  (Leningrad, Russia) V.1-145, 1949-82.  Discontinued.
   Volume(issue)/page/year: 111,10,1975

                              *** REVIEWS ***
 
   ACGIH TLV-TWA 858 mg/m3 (100 ppm)
   DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices
   (BEIs) booklet issues by American Conference of Governmental Industrial
   Hygienists (ACGIH), Cincinnati, OH, 1996  Volume(issue)/page/year:
   TLV/BEI,1997

                    *** U.S. STANDARDS AND REGULATIONS ***
 
   MSHA STANDARD-air:TWA 100 ppm (860 mg/m3)
   DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices
   (BEIs) booklet issues by American Conference of Governmental Industrial
   Hygienists (ACGIH), Cincinnati, OH, 1996  Volume(issue)/page/year: 3,86,1971

   OSHA PEL (Gen Indu):8H TWA 100 ppm (860 mg/m3)
   CFRGBR Code of Federal Regulations.  (U.S. Government Printing Office, Supt.
   of Documents, Washington, DC 20402)  Volume(issue)/page/year:
   29,1910.1000,1994

   OSHA PEL (Construc):8H TWA 100 ppm (860 mg/m3)
   CFRGBR Code of Federal Regulations.  (U.S. Government Printing Office, Supt.
   of Documents, Washington, DC 20402)  Volume(issue)/page/year:
   29,1926.55,1994

   OSHA PEL (Shipyard):8H TWA 100 ppm (860 mg/m3)
   CFRGBR Code of Federal Regulations.  (U.S. Government Printing Office, Supt.
   of Documents, Washington, DC 20402)  Volume(issue)/page/year:
   29,1915.1000,1993

   OSHA PEL (Fed Cont):8H TWA 100 ppm (860 mg/m3)
   CFRGBR Code of Federal Regulations.  (U.S. Government Printing Office, Supt.
   of Documents, Washington, DC 20402)  Volume(issue)/page/year:
   41,50-204.50,1994

                    *** OCCUPATIONAL EXPOSURE LIMITS ***
 
   OEL-AUSTRALIA:TWA 100 ppm (860 mg/m3) JAN 1993
   
   OEL-AUSTRIA:TWA 100 ppm (860 mg/m3) JAN 1993
   
   OEL-BELGIUM:TWA 100 ppm (858 mg/m3) JAN 1993
   
   OEL-DENMARK:TWA 100 ppm (860 mg/m3) JAN 1993
   
   OEL-FINLAND:TWA 100 ppm (860 mg/m3);STEL 150 ppm (1290 mg/m3) JAN 1993
   
   OEL-FRANCE:TWA 100 ppm (860 mg/m3) JAN 1993
   
   OEL-GERMANY:TWA 100 ppm (860 mg/m3) JAN 1993
   
   OEL-THE NETHERLANDS:TWA 100 ppm (860 mg/m3) JAN 1993
   
   OEL-THE PHILIPPINES:TWA 100 ppm (860 mg/m3) JAN 1993
   
   OEL-SWITZERLAND:TWA 100 ppm (860 mg/m3);STEL 200 ppm JAN 1993
   
   OEL-TURKEY:TWA 100 ppm (860 mg/m3) JAN 1993
   
   OEL-UNITED KINGDOM:TWA 100 ppm (860 mg/m3);STEL 150 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 RECOMMENDED EXPOSURE LEVEL (REL) :
   NIOSH REL TO DIFLUORODIBROMOMETHANE-air:10H TWA 100 ppm
REFERENCE :
   NIOSH* National Institute for Occupational Safety and Health, U.S. Dept. of
   Health, Education, and Welfare, Reports and Memoranda.
   Volume(issue)/page/year: DHHS #92-100,1992

NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA :
   NOHS - National Occupational Hazard Survey (1974)
     NOHS Hazard Code - 25515
       No. of Facilities: 40 (estimated)
       No. of Industries: 2
       No. of Occupations: 3
       No. of Employees: 2234 (estimated)
   
   NOES - National Occupational Exposure Survey (1983)
     NOES Hazard Code - 25515
       No. of Facilities: 7 (estimated)
       No. of Industries: 1
       No. of Occupations: 1
       No. of Employees: 28 (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: Difluorodibromomethane, 1012

 
                            *** END OF RECORD ***