*** CHEMICAL IDENTIFICATION ***

RTECS NUMBER            : VV7311000
CHEMICAL NAME           : Silica, amorphous - diatomaceous earth
CAS REGISTRY NUMBER     : 61790-53-2
OTHER CAS REGISTRY NOS. : 12750-99-1
                          29847-98-1
                          37337-67-0
                          54511-18-1
                          56748-40-4
                          67016-73-3
LAST UPDATED            : 199712
DATA ITEMS CITED        : 23
COMPOUND DESCRIPTOR     : Tumorigen
SYNONYMS/TRADE NAMES :
   * Celite
   * Diatomaceous earth, natural
   * Kieselguhr
   * Silica, amorphous, diatomaceous earth, containing >1 % crystalline silica
   * Silica, amorphous - diatomaceous earth (uncalcined)

                              *** REVIEWS ***
 
   ACGIH TLV-TWA 3 mg/m3, total dust
   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-TWA 10 mg/m3, total dust
   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

   IARC Cancer Review:Animal Inadequate Evidence
   IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals
   to Man.  (WHO Publications Centre USA, 49 Sheridan Ave., Albany, NY 12210)
   V.1-    1972-  Volume(issue)/page/year: 42,39,1987

   IARC Cancer Review:Human Inadequate Evidence
   IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals
   to Man.  (WHO Publications Centre USA, 49 Sheridan Ave., Albany, NY 12210)
   V.1-    1972-  Volume(issue)/page/year: 42,39,1987

   IARC Cancer Review:Animal Inadeauate Evidence
   IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals
   to Man.  (WHO Publications Centre USA, 49 Sheridan Ave., Albany, NY 12210)
   V.1-    1972-  Volume(issue)/page/year: 68,41,1997

   IARC Cancer Review:Human Inadequate Evidence
   IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals
   to Man.  (WHO Publications Centre USA, 49 Sheridan Ave., Albany, NY 12210)
   V.1-    1972-  Volume(issue)/page/year: 68,41,1997

   IARC Cancer Review:Group 3
   IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals
   to Man.  (WHO Publications Centre USA, 49 Sheridan Ave., Albany, NY 12210)
   V.1-    1972-  Volume(issue)/page/year: 68,41,1997

                    *** U.S. STANDARDS AND REGULATIONS ***
 
   MSHA STANDARD-dust in air:TWA 20 mccpf
   DTLWS* "Documentation of the Threshold Limit Values for Substances in
   Workroom Air," Supplements. For publisher information, see 85INA8.
   Volume(issue)/page/year: 3,33,1973

   OSHA PEL (Gen Indu):8H TWA 80 mg/m3/%SiO2
   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 80 mg/m3/%SiO2
   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 20 mppcf/(%SiO2+5)
   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 20 mppcf/(%SiO2+5)
   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-GERMANY:TWA 4 mg/m3 JAN 1993
   
   OEL-THAILAND:TWA 80 mg/m3 JAN 1993
   
   OEL-UNITED KINGDOM:TWA 3 mg/m3 (resp. dust) JAN 1993
   
   OEL-UNITED KINGDOM:TWA 6 mg/m3 (total 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 SILICA, amorphous,diatomaceous earth-air:TWA 6 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 - X3017
       No. of Facilities: 11151 (estimated)
       No. of Industries: 109
       No. of Occupations: 97
       No. of Employees: 169362 (estimated)
       No. of Female Employees: 24496 (estimated)

                          *** STATUS IN U.S. ***
 
   EPA TSCA Section 8(b) CHEMICAL INVENTORY
   
   EPA TSCA TEST SUBMISSION (TSCATS) DATA BASE, JUNE 1998
   
   NIOSH Analytical Method, 1994: Silica, amorphous, 7501

 
                            *** END OF RECORD ***