tungsten
Suppliers
Names
[ CAS No. ]:
13472-45-2
[ Name ]:
tungsten
[Synonym ]:
EINECS 231-143-9
Sodium tungstate
TUNGSTEN
MFCD00011461
Chemical & Physical Properties
[ Density]:
3.25
[ Boiling Point ]:
5660 °C(lit.)
[ Melting Point ]:
698ºC
[ Molecular Formula ]:
W
[ Molecular Weight ]:
183.84000
[ Exact Mass ]:
183.95100
[ Appearance of Characters ]:
wire
[ Water Solubility ]:
H2O: soluble
MSDS
Toxicological Information
CHEMICAL IDENTIFICATION
- RTECS NUMBER :
- YO7875000
- CHEMICAL NAME :
- Tungstic acid, disodium salt
- CAS REGISTRY NUMBER :
- 13472-45-2
- LAST UPDATED :
- 199712
- DATA ITEMS CITED :
- 34
- MOLECULAR FORMULA :
- O4-W.2Na
- MOLECULAR WEIGHT :
- 293.83
- WISWESSER LINE NOTATION :
- NA2 WO-O4
HEALTH HAZARD DATA
ACUTE TOXICITY DATA
- TYPE OF TEST :
- LD50 - Lethal dose, 50 percent kill
- ROUTE OF EXPOSURE :
- Oral
- SPECIES OBSERVED :
- Rodent - rat
- DOSE/DURATION :
- 1190 mg/kg
- TOXIC EFFECTS :
- Behavioral - excitement Behavioral - muscle weakness
- TYPE OF TEST :
- LD50 - Lethal dose, 50 percent kill
- ROUTE OF EXPOSURE :
- Subcutaneous
- SPECIES OBSERVED :
- Rodent - rat
- DOSE/DURATION :
- 240 mg/kg
- TOXIC EFFECTS :
- Details of toxic effects not reported other than lethal dose value
- TYPE OF TEST :
- LD50 - Lethal dose, 50 percent kill
- ROUTE OF EXPOSURE :
- Oral
- SPECIES OBSERVED :
- Rodent - mouse
- DOSE/DURATION :
- 240 mg/kg
- TOXIC EFFECTS :
- Autonomic Nervous System - other (direct) parasympathomimetic Behavioral - excitement Behavioral - muscle weakness
- TYPE OF TEST :
- LDLo - Lowest published lethal dose
- ROUTE OF EXPOSURE :
- Subcutaneous
- SPECIES OBSERVED :
- Mammal - dog
- DOSE/DURATION :
- 140 mg/kg
- TOXIC EFFECTS :
- Details of toxic effects not reported other than lethal dose value
- TYPE OF TEST :
- LD50 - Lethal dose, 50 percent kill
- ROUTE OF EXPOSURE :
- Intravenous
- SPECIES OBSERVED :
- Mammal - cat
- DOSE/DURATION :
- 139 mg/kg
- TOXIC EFFECTS :
- Vascular - BP lowering not characterized in autonomic section Lungs, Thorax, or Respiration - respiratory depression
- TYPE OF TEST :
- LD50 - Lethal dose, 50 percent kill
- ROUTE OF EXPOSURE :
- Oral
- SPECIES OBSERVED :
- Rodent - rabbit
- DOSE/DURATION :
- 875 mg/kg
- TOXIC EFFECTS :
- Behavioral - excitement Behavioral - muscle weakness
- TYPE OF TEST :
- LDLo - Lowest published lethal dose
- ROUTE OF EXPOSURE :
- Subcutaneous
- SPECIES OBSERVED :
- Rodent - rabbit
- DOSE/DURATION :
- 78 mg/kg
- TOXIC EFFECTS :
- Details of toxic effects not reported other than lethal dose value
- TYPE OF TEST :
- LD50 - Lethal dose, 50 percent kill
- ROUTE OF EXPOSURE :
- Intramuscular
- SPECIES OBSERVED :
- Rodent - rabbit
- DOSE/DURATION :
- 105 mg/kg
- TOXIC EFFECTS :
- Behavioral - convulsions or effect on seizure threshold Behavioral - food intake (animal) Gastrointestinal - hypermotility, diarrhea
- TYPE OF TEST :
- LD50 - Lethal dose, 50 percent kill
- ROUTE OF EXPOSURE :
- Oral
- SPECIES OBSERVED :
- Rodent - guinea pig
- DOSE/DURATION :
- 1152 mg/kg
- TOXIC EFFECTS :
- Behavioral - excitement Behavioral - muscle weakness
- TYPE OF TEST :
- LDLo - Lowest published lethal dose
- ROUTE OF EXPOSURE :
- Subcutaneous
- SPECIES OBSERVED :
- Rodent - guinea pig
- DOSE/DURATION :
- 810 mg/kg
- TOXIC EFFECTS :
- Details of toxic effects not reported other than lethal dose value
- TYPE OF TEST :
- TDLo - Lowest published toxic dose
- ROUTE OF EXPOSURE :
- Oral
- SPECIES OBSERVED :
- Rodent - rat
- DOSE/DURATION :
- 106 mg/kg/30W-I
- TOXIC EFFECTS :
- Behavioral - alteration of classical conditioning
- TYPE OF TEST :
- TCLo - Lowest published toxic concentration
- ROUTE OF EXPOSURE :
- Inhalation
- SPECIES OBSERVED :
- Rodent - rat
- DOSE/DURATION :
- 504 ug/m3/24H/17W-C
- TOXIC EFFECTS :
- Blood - other changes Biochemical - Enzyme inhibition, induction, or change in blood or tissue levels - true cholinesterase Biochemical - Metabolism (Intermediary) - other proteins
- TYPE OF TEST :
- TDLo - Lowest published toxic dose
- ROUTE OF EXPOSURE :
- Oral
- SPECIES OBSERVED :
- Rodent - rabbit
- DOSE/DURATION :
- 1214 mg/kg/35W-I
- TOXIC EFFECTS :
- Biochemical - Enzyme inhibition, induction, or change in blood or tissue levels - true cholinesterase Biochemical - Enzyme inhibition, induction, or change in blood or tissue levels - phosphatases
- TYPE OF TEST :
- TCLo - Lowest published toxic concentration
- ROUTE OF EXPOSURE :
- Inhalation
- DOSE :
- 504 ug/m3/24H
- SEX/DURATION :
- male 17 week(s) pre-mating
- TOXIC EFFECTS :
- Reproductive - Paternal Effects - spermatogenesis (incl. genetic material, sperm morphology, motility, and count)
MUTATION DATA
- TYPE OF TEST :
- Sex chromosome loss and nondisjunction
- TEST SYSTEM :
- Yeast - Saccharomyces cerevisiae
- REFERENCE :
- MUTAEX Mutagenesis. (Oxford Univ. Press, Pinkhill House, Southfield Road, Eynsham, Oxford OX8 1JJ, UK) V.1- 1986- Volume(issue)/page/year: 1,21,1986 *** REVIEWS *** ACGIH TLV-TWA 5 mg(W)/m3; STEL 10 mg(W)/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 5 mg(W)/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: 3,272,1971 *** OCCUPATIONAL EXPOSURE LIMITS *** OEL-AUSTRALIA:TWA 5 mg(W)/m3;STEL 10 mg(W)/m3 JAN 1993 OEL-BELGIUM:TWA 5 mg(W)/m3;STEL 10 mg(W)/m3 JAN 1993 OEL-DENMARK:TWA 5 mg(W)/m3 JAN 1993 OEL-FINLAND:TWA 5 mg(W)/m3 JAN 1993 OEL-THE NETHERLANDS:TWA 5 mg(W)/m3 JAN 1993 OEL-THE PHILIPPINES:TWA 1 mg(W)/m3 JAN 1993 OEL-SWEDEN:TWA 5 mg(W)/m3 JAN 1993 OEL-SWITZERLAND:TWA 5 mg(W)/m3 JAN 1993 OEL-UNITED KINGDOM:TWA 5 mg(W)/m3;STEL 10 mg(W)/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 RECOMMENDED EXPOSURE LEVEL (REL) : NIOSH REL TO TUNGSTEN, soluble-air:10H TWA 1 mg(W)/m3;STEL 3 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 - 84829 No. of Facilities: 895 (estimated) No. of Industries: 13 No. of Occupations: 20 No. of Employees: 15470 (estimated) No. of Female Employees: 8875 (estimated)
Safety Information
[ Symbol ]:
GHS07
[ Signal Word ]:
Warning
[ Hazard Statements ]:
H315-H319
[ Precautionary Statements ]:
P280-P305 + P351 + P338-P337 + P313
[ Hazard Codes ]:
Xn: Harmful;
[ Risk Phrases ]:
36/38
[ Safety Phrases ]:
6-26-36
[ RIDADR ]:
UN 3089 4.1/PG 2
[ WGK Germany ]:
3
[ RTECS ]:
YO7175000
[ Packaging Group ]:
III
[ Hazard Class ]:
6.1(b)
[ HS Code ]:
2841802000
Customs
[ HS Code ]: 2841802000
Articles
BMC Res. Notes 5 , 238, (2012)
The methanogenic Archaea Methanosphaera stadtmanae has been detected in the human gut microbiota by both culture and culture-independent methods. Its growth reaches an exponential phase after 5 to 7-d...
Chemosphere 85(4) , 558-64, (2011)
This study concerns the elimination of methabenzthiazuron (MBTU) photocatalysed by sodium decatungstate salts W10O32(4-)·(DTA) in aqueous solution under irradiation at 365 nm. Ninety percentage of MBT...
Toxicol. Appl. Pharmacol. 254(2) , 133-7, (2011)
The debate on tungsten (W) is fostered by its continuous usage in military munitions. Reports demonstrate W solubilizes in soil and can migrate into drinking water supplies and, therefore, is a potent...