409-21-2

MOLECULAR FORMULA :

C-Si

MOLECULAR WEIGHT :

40.10

WISWESSER LINE NOTATION :

.SI..C

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :

TCLo - Lowest published toxic concentration

ROUTE OF EXPOSURE :

Inhalation

SPECIES OBSERVED :

Rodent - rat

DOSE/DURATION :

60 mg/m3/6H/13W-I

TOXIC EFFECTS :

Lungs, Thorax, or Respiration - changes in lung weight

REFERENCE :

FAATDF Fundamental and Applied Toxicology. (Academic Press, Inc., 1 E. First St., Duluth, MN 55802) V.1- 1981- Volume(issue)/page/year: 16,128,1991 ** TUMORIGENIC DATA **

TYPE OF TEST :

TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :

Intraperitoneal

SPECIES OBSERVED :

Rodent - rat

DOSE/DURATION :

300 mg/kg/26W-I

TOXIC EFFECTS :

Tumorigenic - equivocal tumorigenic agent by RTECS criteria Gastrointestinal - tumors

REFERENCE :

EKSODD Eksperimental'naya Onkologiya. Experimental Oncology. (V/O Mezhdunarodnaya Kniga, 113095 Mosow, USSR) V.1- 1979- Volume(issue)/page/year: 11(2),13,1989

TYPE OF TEST :

TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :

Implant

SPECIES OBSERVED :

Rodent - rat

DOSE/DURATION :

200 mg/kg

REFERENCE :

JJIND8 JNCI, Journal of the National Cancer Institute. (Washington, DC) V.61-79, 1978-87. For publisher information, see JNCIEQ. Volume(issue)/page/year: 67,965,1981 *** REVIEWS *** 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 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 *** U.S. STANDARDS AND REGULATIONS *** MSHA STANDARD:NUISANCE PARTICULATES DTLWS* "Documentation of the Threshold Limit Values for Substances in Workroom Air," Supplements. For publisher information, see 85INA8. Volume(issue)/page/year: 3,28,1973 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-FRANCE:TWA 10 mg/m3 JAN 1993 OEL-GERMANY:TWA 4 mg/m3 JAN 1993 OEL-THE NETHERLANDS:TWA 10 mg/m3 JAN 1993 OEL-SWITZERLAND:TWA 4 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 SILICON CARBIDE, resp. fraction-air:10H 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 SILICON CARBIDE, 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 - 17525 No. of Facilities: 25235 (estimated) No. of Industries: 184 No. of Occupations: 97 No. of Employees: 268082 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - X4228 No. of Facilities: 158 (estimated) No. of Industries: 4 No. of Occupations: 12 No. of Employees: 8693 (estimated) No. of Female Employees: 84 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - X6494 No. of Facilities: 1250 (estimated) No. of Industries: 25 No. of Occupations: 22 No. of Employees: 17481 (estimated) No. of Female Employees: 1482 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - 17525 No. of Facilities: 13729 (estimated) No. of Industries: 129 No. of Occupations: 97 No. of Employees: 250945 (estimated) No. of Female Employees: 19568 (estimated)