Sodium tungstate
CAS 13472-45-2
EC 236-743-4
Formula Na.O.W
MW 183.84 g/mol
Salts & Minerals Mining & MetalsTextile, Leather & PaperPharmaceuticals & Healthcare CatalysisCorrosion Inhibition
Description
Sodium tungstate (CAS 13472-45-2, EC 236-743-4), also known as disodium tungstate, sodium wolframate, and Na2WO4, is an inorganic tungsten salt supplied as colorless water-soluble crystals. It carries no assigned E-code and is classified under Salts & Minerals.
In textile and leather processing, sodium tungstate acts as a flame retardant and weighting agent by depositing tungsten oxide within fiber structures under acidic conditions. In industrial water treatment and metal finishing, it functions as an anodic corrosion inhibitor, forming a protective oxide layer on metal surfaces. It also serves as an oxidation catalyst in pharmaceutical synthesis.
Sodium tungstate is available in technical and reagent grades, with supply subject to REACH registration requirements for EU importers. Standard packaging includes 25 kg bags or drums. Buyers should confirm grade specification and documentation requirements, including SDS and certificate of analysis, prior to procurement.
In textile and leather processing, sodium tungstate acts as a flame retardant and weighting agent by depositing tungsten oxide within fiber structures under acidic conditions. In industrial water treatment and metal finishing, it functions as an anodic corrosion inhibitor, forming a protective oxide layer on metal surfaces. It also serves as an oxidation catalyst in pharmaceutical synthesis.
Sodium tungstate is available in technical and reagent grades, with supply subject to REACH registration requirements for EU importers. Standard packaging includes 25 kg bags or drums. Buyers should confirm grade specification and documentation requirements, including SDS and certificate of analysis, prior to procurement.
Physical Properties
| Melting Point | 698 °C |
| Boiling Point | 5660 °C(lit.) |
| Density | 4.179 g/cm³ |
| Appearance | Colorless crystals.Soluble in water; insoluble in alcohol and acids. Noncom- bustible. |
| Color | white rhombohedral crystals, crystalline |
| Form | wire |
| Water Solubility | g/100g H2O: 71.5 (0°C), 73.0 (20°C), 97.2 (100°C) [LAN05] |
| Vapor Pressure | 0Pa at 25℃ |
| Log P | 0 |
Safety & Handling (Learn More)
Warning GHS07
H
H302H320
P
P264P270P330P501P264+P265P301+P317P337+P317P305+P351+P338
Trade & Regulatory
| UN Number | 3089 |
| ADR Class | 4.1 |
| Packing Group | II |
| WGK (Germany) | 3 |
Other Names
Na2WO4sodium wolframatedisodium tungstateTUNGSTENSODIUM O-TUNGSTATEAMMONIUM WOLFRAMATETUNGSTEN AA STANDARD
Related Products
Raw Materials
Derivatives
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