Sodium tungstate
Agent Name
Sodium tungstate
CAS Number
13472-45-2
Formula
O4-W.2Na
Major Category
Metals
Synonyms
Disodium tetraoxatungstate (2-); Disodium tetraoxotungstate (2-); Disodium tungstate; Disodium tungstate (Na2WO4); Sodium tungstate(VI); Sodium tungstate(VI) (Na2WO4); Sodium tungsten oxide (Na2WO4); Sodium wolframate; Tungstic acid (H2WO4), disodium salt; [ChemIDplus]
Category
Metals, Inorganic Compounds
Description
White solid; [HSDB] White powder; [MSDSonline] Soluble in water; [Hawley]
Sources/Uses
Used to make fire and water resistant fabrics, metallic tungsten, and other tungsten compounds; Also used as a biological reagent, a precipitant for alkaloids, and a catalyst for the oxidation of maleic acid; [HSDB]
Comments
In high-dose animal experiments, sodium tungstate is the most toxic form of tungsten; Oral LD50 (rat) = 223-255 mg/kg; [ACGIH] May cause irritation; [MSDSonline] See "Tungsten."
Biomedical References
Exposure Assessment
TLV (ACGIH)
3 mg/m3, as W, respirable particulate matter
Diseases, Processes, and Activities Linked to This Agent
Processes
Industrial Processes with risk of exposure: