*** CHEMICAL IDENTIFICATION ***

RTECS NUMBER            : ZH9000000
CHEMICAL NAME           : Zirconium(IV) silicate (1:1)
CAS REGISTRY NUMBER     : 14940-68-2
LAST UPDATED            : 199712
DATA ITEMS CITED        : 26
MOLECULAR FORMULA       : O4-Si.Zr
MOLECULAR WEIGHT        : 183.31
WISWESSER LINE NOTATION :  ZR  SI-O4
SYNONYMS/TRADE NAMES :
   * Hyacinth
   * Silicic acid, zirconium(4+) salt (1:1)
   * Zircon

                              *** REVIEWS ***
 
   ACGIH TLV-TWA 5 mg(Zr)/m3; STEL 10 mg(Zr)/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 5 mg(Zr)/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:
   3,285,1971

   OSHA PEL (Gen Indu):8H TWA 5 mg(Zr)/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 5 mg(Zr)/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 5 mg(Zr)/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 5 mg(Zr)/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 5 mg(Zr)/m3;STEL 10 mg(Zr)/m3 JAN 1993
   
   OEL-BELGIUM:TWA 5 mg(Zr)/m3;STEL 10 mg(Zr)/m3 JAN 1993
   
   OEL-DENMARK:TWA 5 mg(Zr)/m3 JAN 1993
   
   OEL-FINLAND:TWA 5 mg(Zr)/m3 JAN 1993
   
   OEL-GERMANY:TWA 5 mg(Zr)/m3 JAN 1993
   
   OEL-HUNGARY:STEL 5 mg(Zr)/m3 JAN 1993
   
   OEL-THE NETHERLANDS:TWA 5 mg(Zr)/m3 JAN 1993
   
   OEL-THE PHILIPPINES:TWA 5 mg(Zr)/m3 JAN 1993
   
   OEL-RUSSIA:STEL 6 ppm JAN 1993
   
   OEL-SWITZERLAND:TWA 5 mg(Zr)/m3 JAN 1993
   
   OEL-TURKEY:TWA 5 mg(Zr)/m3 JAN 1993
   
   OEL-UNITED KINGDOM:TWA 5 mg(Zr)/m3;STEL 10 mg(Zr)/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 :
   NOES - National Occupational Exposure Survey (1983)
     NOES Hazard Code - X6423
       No. of Facilities: 783 (estimated)
       No. of Industries: 18
       No. of Occupations: 26
       No. of Employees: 27712 (estimated)
       No. of Female Employees: 2739 (estimated)
   
   NOES - National Occupational Exposure Survey (1983)
     NOES Hazard Code - X9480
       No. of Facilities: 76 (estimated)
       No. of Industries: 4
       No. of Occupations: 10
       No. of Employees: 3109 (estimated)
       No. of Female Employees: 55 (estimated)
   
   NOES - National Occupational Exposure Survey (1983)
     NOES Hazard Code - X9484
       No. of Facilities: 131 (estimated)
       No. of Industries: 4
       No. of Occupations: 10
       No. of Employees: 3737 (estimated)
       No. of Female Employees: 55 (estimated)

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

 
                            *** END OF RECORD ***