*** CHEMICAL IDENTIFICATION ***
RTECS NUMBER : VW0400000
CHEMICAL NAME : Silicon
CAS REGISTRY NUMBER : 7440-21-3
LAST UPDATED : 199712
DATA ITEMS CITED : 31
MOLECULAR FORMULA : Si
MOLECULAR WEIGHT : 28.09
COMPOUND DESCRIPTOR : Primary Irritant
SYNONYMS/TRADE NAMES :
* Defoamer S-10
* Polyeristalline silicon powder
* Silicon
*** HEALTH HAZARD DATA ***
** SKIN/EYE IRRITATION DATA **
TYPE OF TEST : Standard Draize test
ROUTE OF EXPOSURE : Administration into the eye
SPECIES OBSERVED : Rodent - rabbit
DOSE/DURATION : 3 mg
REACTION SEVERITY : Mild
REFERENCE :
FAONAU FAO Nutrition Meetings Report Series. (Rome, Italy) No.?-57,
1948-77. Discontinued. Volume(issue)/page/year: 53A,21,1974
** ACUTE TOXICITY DATA **
TYPE OF TEST : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - rat
DOSE/DURATION : 3160 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
FAONAU FAO Nutrition Meetings Report Series. (Rome, Italy) No.?-57,
1948-77. Discontinued. Volume(issue)/page/year: 53A,21,1974
TYPE OF TEST : LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE : Intraperitoneal
SPECIES OBSERVED : Rodent - rat
DOSE/DURATION : 500 mg/kg
TOXIC EFFECTS :
Sense Organs and Special Senses (Olfaction) - effect, not otherwise
specified
Sense Organs and Special Senses (Eye) - effect, not otherwise specified
Lungs, Thorax, or Respiration - respiratory stimulation
REFERENCE :
NTIS** National Technical Information Service. (Springfield, VA 22161)
Formerly U.S. Clearinghouse for Scientific & Technical Information.
Volume(issue)/page/year: OTS0536164
*** REVIEWS ***
ACGIH TLV-TWA 10 mg/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 10 mg/m3
DTLWS* "Documentation of the Threshold Limit Values for Substances in
Workroom Air," Supplements. For publisher information, see 85INA8.
Volume(issue)/page/year: 3,27,1973
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-DENMARK:TWA 10 mg/m3 JAN 1993
OEL-FRANCE:TWA 10 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, respirable 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, 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 - 68695
No. of Facilities: 3856 (estimated)
No. of Industries: 48
No. of Occupations: 66
No. of Employees: 99138 (estimated)
NOES - National Occupational Exposure Survey (1983)
NOES Hazard Code - X4229
No. of Facilities: 12 (estimated)
No. of Industries: 1
No. of Occupations: 5
No. of Employees: 1740 (estimated)
No. of Female Employees: 503 (estimated)
NOES - National Occupational Exposure Survey (1983)
NOES Hazard Code - X4230
No. of Facilities: 118 (estimated)
No. of Industries: 6
No. of Occupations: 6
No. of Employees: 1962 (estimated)
No. of Female Employees: 112 (estimated)
NOES - National Occupational Exposure Survey (1983)
NOES Hazard Code - X6495
No. of Facilities: 19 (estimated)
No. of Industries: 1
No. of Occupations: 2
No. of Employees: 2379 (estimated)
NOES - National Occupational Exposure Survey (1983)
NOES Hazard Code - 68695
No. of Facilities: 59062 (estimated)
No. of Industries: 296
No. of Occupations: 129
No. of Employees: 693583 (estimated)
No. of Female Employees: 28164 (estimated)
*** STATUS IN U.S. ***
EPA TSCA Section 8(b) CHEMICAL INVENTORY
EPA TSCA Section 8(d) unpublished health/safety studies
EPA TSCA TEST SUBMISSION (TSCATS) DATA BASE, JUNE 1998
*** END OF RECORD ***