*** CHEMICAL IDENTIFICATION ***

RTECS NUMBER            : BQ9200000
CHEMICAL NAME           : Ammonium hydrogen fluoride
CAS REGISTRY NUMBER     : 1341-49-7
LAST UPDATED            : 199712
DATA ITEMS CITED        : 29
MOLECULAR FORMULA       : F2-H.H4-N
MOLECULAR WEIGHT        : 57.06
WISWESSER LINE NOTATION : .Z&..H-F
SYNONYMS/TRADE NAMES :
   * Acid ammonium fluoride
   * Ammonium bifluoride
   * Ammonium difluoride
   * Ammonium fluoride comp. with hydrogen fluoride (1:1)
   * Ammonium hydrofluoride
   * Ammonium hydrogen bifluoride
   * Ammonium hydrogen difluoride

                              *** REVIEWS ***
 
   ACGIH TLV-TWA 2.5 mg(F)/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:
   TLV/BEI,1997

   ACGIH TLV-Not classifiable as a human carcinogen
   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 2.5 mg(F)/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:
   3,116,1971

   OSHA PEL (Gen Indu):8H TWA 2.5 mg(F)/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 2.5 mg(F)/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 2.5 mg(F)/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 2.5 mg(F)/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 2.5 mg(F)/m3 JAN 1993
   
   OEL-BELGIUM:TWA 2.5 mg(F)/m3 JAN 1993
   
   OEL-DENMARK:TWA 2.5 mg(F)/m3 JAN 1993
   
   OEL-FINLAND:TWA 2.5 mg(F)/m3 JAN 1993
   
   OEL-FRANCE:TWA 2.5 mg(F)/m3 JAN 1993
   
   OEL-GERMANY:TWA 2.5 mg(F)/m3 JAN 1993
   
   OEL-HUNGARY:TWA 1 mg(F)/m3;STEL 2 mg(F)/m3 JAN 1993
   
   OEL-THE NETHERLANDS:TWA 2.5 mg(F)/m3 JAN 1993
   
   OEL-THE PHILIPPINES:TWA 2.5 mg(F)/m3 JAN 1993
   
   OEL-POLAND:TWA 1 mg(F)/m3 JAN 1993
   
   OEL-RUSSIA:TWA 0.2 mg/m3;STEL 1 mg/m3 JAN 1993
   
   OEL-SWEDEN:TWA 2 mg(F)/m3 JAN 1993
   
   OEL-SWITZERLAND:TWA 1.8 ppm (1.5 mg(F)/m3);STEL 9.0 ppm JAN 1993
   
   OEL-THAILAND:TWA 2.5 mg(F)/m3 JAN 1993
   
   OEL-TURKEY:TWA 2.5 mg(F)/m3 JAN 1993
   
   OEL-UNITED KINGDOM:TWA 2.5 mg(F)/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 RECOMMENDED EXPOSURE LEVEL (REL) :
   NIOSH REL TO FLUORIDES, INORGANIC-air:10H TWA 2.5 mg(F)/m3
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 - 80261
       No. of Facilities: 1040 (estimated)
       No. of Industries: 26
       No. of Occupations: 28
       No. of Employees: 21273 (estimated)
   
   NOES - National Occupational Exposure Survey (1983)
     NOES Hazard Code - 80261
       No. of Facilities: 9597 (estimated)
       No. of Industries: 68
       No. of Occupations: 65
       No. of Employees: 126750 (estimated)
       No. of Female Employees: 51882 (estimated)

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

 
                            *** END OF RECORD ***