*** CHEMICAL IDENTIFICATION ***

RTECS NUMBER            : WS6920000
CHEMICAL NAME           : Sulfuric acid, calcium salt (1:1)
CAS REGISTRY NUMBER     : 7778-18-9
OTHER CAS REGISTRY NOS. : 23296-15-3
LAST UPDATED            : 199712
DATA ITEMS CITED        : 20
MOLECULAR FORMULA       : Ca.O4-S
MOLECULAR WEIGHT        : 136.14
SYNONYMS/TRADE NAMES :
   * Anhydrous calcium sulfate
   * Calcium sulfate
   * Crysalba
   * Drierite
   * GIBS
   * Thiolite

                              *** REVIEWS ***
 
   ACGIH TLV-TWA 10 mg/m3, Inhalable particulate
   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 ***
 
   EPA FIFRA 1988 PESTICIDE SUBJECT TO REGISTRATION OR RE-REGISTRATION
   FEREAC Federal Register.  (U.S. Government Printing Office, Supt. of
   Documents, Washington, DC 20402) V.1-    1936-  Volume(issue)/page/year:
   54,7740,1989

   OSHA PEL (Gen Indu):8H TWA 15 mg/m3, total dust
   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 (Gen Indu):8H TWA 5 mg/m3, respirable fraction
   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 15 mg/m3, total dust
   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 (Construc):8H TWA 5 mg/m3, respirable fraction
   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 15 mg/m3, total dust
   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 (Shipyard):8H TWA 5 mg/m3, respirable fraction
   CFRGBR Code of Federal Regulations.  (U.S. Government Printing Office, Supt.
   of Documents, Washington, DC 20402)  Volume(issue)/page/year:
   29,1915.1000,1993

                    *** OCCUPATIONAL EXPOSURE LIMITS ***
 
   OEL-AUSTRALIA:TWA 10 mg/m3 JAN 1993
   
   OEL-BELGIUM:TWA 10 mg/m3 JAN 1993
   
   OEL-UNITED KINGDOM:TWA 10 mg/m3 (total dust) JAN 1993
   
   OEL-UNITED KINGDOM:TWA 5 mg/m3 (resp. dust) 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 CALCIUM SULFATE, respirable fraction-air:TWA 5 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 CALCIUM SULFATE, total dust-air:10H TWA 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 OCCUPATIONAL EXPOSURE SURVEY DATA :
   NOHS - National Occupational Hazard Survey (1974)
     NOHS Hazard Code - 80244
       No. of Facilities: 20643 (estimated)
       No. of Industries: 155
       No. of Occupations: 105
       No. of Employees: 243889 (estimated)
   
   NOES - National Occupational Exposure Survey (1983)
     NOES Hazard Code - 80244
       No. of Facilities: 10251 (estimated)
       No. of Industries: 76
       No. of Occupations: 92
       No. of Employees: 209809 (estimated)
       No. of Female Employees: 25489 (estimated)

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

 
                            *** END OF RECORD ***