*** CHEMICAL IDENTIFICATION ***

RTECS NUMBER            : YO7250000
CHEMICAL NAME           : Tungsten carbide
CAS REGISTRY NUMBER     : 12070-12-1
LAST UPDATED            : 199806
DATA ITEMS CITED        : 21
MOLECULAR FORMULA       : C-W
MOLECULAR WEIGHT        : 195.86
WISWESSER LINE NOTATION : .WO..C
COMPOUND DESCRIPTOR     : Mutagen
SYNONYMS/TRADE NAMES :
   * NCI C61198
   * Tungsten monocarbide
 
                       *** HEALTH HAZARD DATA ***
 
                            ** MUTATION DATA **
 
TYPE OF TEST            : Micronucleus test
TEST SYSTEM             : Human Leukocyte
DOSE/DURATION           : 50 mg/L
REFERENCE :
   MUREAV Mutation Research.  (Elsevier Science Pub. B.V., POB 211, 1000 AE
   Amsterdam, Netherlands) V.1-    1964-  Volume(issue)/page/year: 392,31,1997
 
TYPE OF TEST            : DNA damage
TEST SYSTEM             : Human Leukocyte
DOSE/DURATION           : 10 mg/L
REFERENCE :
   MUREAV Mutation Research.  (Elsevier Science Pub. B.V., POB 211, 1000 AE
   Amsterdam, Netherlands) V.1-    1964-  Volume(issue)/page/year: 392,31,1997

                              *** REVIEWS ***
 
   ACGIH TLV-TWA 5 mg(W)/m3; STEL 10 mg(W)/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

                    *** U.S. STANDARDS AND REGULATIONS ***
 
   MSHA STANDARD-air:TWA 5 mg(W)/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:
   3,272,1971

                    *** OCCUPATIONAL EXPOSURE LIMITS ***
 
   OEL-AUSTRALIA:TWA 5 mg(W)/m3;STEL 10 mg(W)/m3 JAN 1993
   
   OEL-BELGIUM:TWA 5 mg(W)/m3;STEL 10 mg(W)/m3 JAN 1993
   
   OEL-DENMARK:TWA 5 mg(W)/m3 JAN 1993
   
   OEL-FINLAND:TWA 5 mg(W)/m3 JAN 1993
   
   OEL-THE NETHERLANDS:TWA 5 mg(W)/m3 JAN 1993
   
   OEL-THE PHILIPPINES:TWA 1 mg(W)/m3 JAN 1993
   
   OEL-SWEDEN:TWA 5 mg(W)/m3 JAN 1993
   
   OEL-SWITZERLAND:TWA 5 mg(W)/m3 JAN 1993
   
   OEL-UNITED KINGDOM:TWA 5 mg(W)/m3;STEL 10 mg(W)/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 CEMENTED TUNGSTEN CARBIDE-air:10H TWA 0.1 mg(Co)/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 RECOMMENDED EXPOSURE LEVEL (REL) :
   NIOSH REL TO TUNGSTEN, insoluble-air:TWA 5 mg(W)/m3;STEL 10 mg/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 RECOMMENDED EXPOSURE LEVEL (REL) :
   NIOSH REL TO CEMENTED TUNGSTEN CARBIDE-air:10H TWA 0.015 mg/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 :
   NOES - National Occupational Exposure Survey (1983)
     NOES Hazard Code - X2977
       No. of Facilities: 158 (estimated)
       No. of Industries: 4
       No. of Occupations: 7
       No. of Employees: 3395 (estimated)
       No. of Female Employees: 297 (estimated)

                          *** STATUS IN U.S. ***
 
   EPA TSCA Section 8(b) CHEMICAL INVENTORY
   
   EPA TSCA TEST SUBMISSION (TSCATS) DATA BASE, JUNE 1998

 
                            *** END OF RECORD ***