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Sodium Tungstate Dihydrate

Sodium Tungstate Dihydrate

CAS Number: 10213-10-2

Molecular Formula: H4Na2O6W

H2O.Na.1/2O4WTungsten Salts & Extraction IntermediatesAnalytical & Clinical Chemistry ReagentsFlame Retardants & Weighting AgentsIntermediate for Tungsten Ore ExtractionReagent for Density Separation MineralsSodium Tungstate Dihydrate 99% Purity Supplier

About Sodium Tungstate Dihydrate

Sodium Tungstate Dihydrate (CAS 10213-10-2), also known as Sodium Orthotungstate, is the most commercially used water-soluble tungsten compound across industrial and specialty chemical manufacturing in the United States. As a highly functional inorganic salt, it is widely used in corrosion inhibitor formulations, catal...

Synonyms

  • Sodium wolframate
  • Sodium tungsten oxide
  • Tungstic acid sodium salt
  • SODIUM TUNGSTATE
  • Sodium-tungstate-dihydrate
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Sodium Tungstate Dihydrate Specifications

CAS Number
10213-10-2
Molecular Formula
H4Na2O6W
Molecular Weight
329.85
IUPAC Name
disodium;dioxido(dioxo)tungsten;dihydrate
Canonical SMILES
O.O.[O-][W](=O)(=O)[O-].[Na+].[Na+]
InChI Key
WPZFLQRLSGVIAA-UHFFFAOYSA-N
InChI
1S/2Na.2H2O.4O.W/h;;2*1H2;;;;;/q2*+1;;;;;2*-1;
PubChem CID
150191
EINECS Number
236-743-4
MDL Number
MFCD00149190
HSN No
28418010
Molecular Weight
329.85
Physical State
Solid
Odour
Odourless
Sodium Tungstate Dihydrate Assay
99.63 %
Hazard Classes and Categories
Acute Tox. 4 (100%)
Precautionary Statement Codes
P264, P270, P301+P317, P330, and P501

Textile Industry: Flame Retardancy & Weighting

Flameproofing agent for fabrics, particularly when mixed with ammonium phosphate. It also serves as a "weighting agent" in the silk industry, increasing the density and improving the "drape" of high-end fabrics

Chemical & Clinical Analysis: Folin-Ciocalteu Reagent

In laboratory environments, fundamental component of the Folin-Ciocalteu reagent, used to measure protein concentrations and phenolic content in biological samples. Catalyst in organic synthesis, specifically for the oxidation of secondary amines

Metallurgy: Heavy Liquid Separation

High density of tungstate solutions, Used to prepare heavy liquids for mineralogical analysis (gravity separation). Allows geologists to separate minerals of different densities safely compared to traditional organic heavy liquids.

Water Treatment & Cooling Systems

Acts as a non-toxic anodic corrosion inhibitor, forming a protective passivating film on steel and aluminium surfaces. Widely specified for closed-loop cooling systems and industrial water treatment as an environmentally friendly alternative to chromate-based inhibitors.

Chemical Manufacturing

As the primary water-soluble tungsten salt, it is a key feedstock in the tungsten value chain, used to produce tungstic acid, ammonium paratungstate (APT), tungsten oxide (WO3), and downstream tungsten metal and salts.

Tungsten Chemical & Metal Extraction Feedstock

A primary water-soluble tungsten intermediate for producing tungstic acid, ammonium paratungstate (APT), tungsten trioxide, and fine tungsten metal powders

Storage Stability

Highly stable. Efflorescent (loses water of crystallization) in dry air

Storage Section

Store in a cool, dry, well-ventilated area. Keep containers tightly closed. It is slightly hygroscopic; prevent moisture ingress to avoid caking

Shipping

Non-hazardous for transport. Available in fiber drums, plastic-lined bags, or 1000kg "Big Bags" for international industrial distribution

COA
Download
  1. Sodium wolframate
  2. Sodium tungsten oxide
  3. Tungstic acid sodium salt
  4. SODIUM TUNGSTATE
  5. Sodium-tungstate-dihydrate

Sodium Tungstate Dihydrate FAQs

Minimum Order Quantity

25 kg (evaluation) · 1 MT (commercial)

Lead Time

3 – 5 weeks estimated

Delivery Terms

FOB*

Packaging

20 L pails, 200 L HDPE drums, 1000 L IBC

US Availability

US Facility Inventory

Documentation

US SDS · COA · TDS · Specification sheet

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California Prop 65*

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