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39651 Tungstosilicic acid hydrate, Reagent Grade

CAS Number
Silicotungstic acid

Stock No. Size Price ($) Quantity Availability
39651-09 10g 29.80
39651-18 50g 84.80
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Tungstosilicic acid hydrate, Reagent Grade


Chemical Properties

Formula Weight
Storage & Sensitivity
Ambient temperatures.
Soluble in water.


Catalyst for organic synthesis, minerals separation, reagent for alkaloids.Tungstosilicic acid hydrate is used to prepare ethylacetate and acetic acid from ethylene. It is used in the preparation of silicotungstate butylmethylimidazolium bromide and charge transfer compounds with Keggin anions. It is also used in catalyst preparation, which is useful for catalytic liquid-phase oxidation of xylene. Further, it acts as a mediator in production of hydrogen through electrolysis of water.


Strongly hygroscopic. Incompatible with strong oxidizing agents.

Literature References

Yang, Z.; Xu, X.; Li, T.; Zhang, N.; Zhao, X.; Chen, W.; Liang, X.; He, X.; Ma, H. Preparation and Catalytic Property of Multi-walled Carbon Nanotubes Supported Keggin-Typed Tungstosilicic Acid for the Baeyer-Villiger Oxidation of Ketones. Catal. Letters 2015, 145 (11), 1955-1960.

Liu, L.; Wang, B.; Du, Y.; Borgna, A. Supported H4SiW12O40Al2O3 solid acid catalysts for dehydration of glycerol to acrolein: Evolution of catalyst structure and performance with calcination temperature. Appl. Catal. A Gen. 2015, 489, 32-41.

GHS Hazard and Precautionary Statements

Hazard Statements: H315-H319-H335

Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.

Precautionary Statements: P261-P264b-P271-P280-P302+P352-P304+P340-P305+P351+P338-P312-P332+P313-P337+P313-P362-P501c

Avoid breathing dust/fume/gas/mist/vapours/spray. Wash face, hands and any exposed skin thoroughly after handling Use only outdoors or in a well-ventilated area. Wear protective gloves/protective clothing/eye protection/face protection. IF ON SKIN: Wash with plenty of soap and water. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Call a POISON CENTER or doctor/physician if you feel unwell. If skin irritation occurs: Get medical advice/attention. If eye irritation persists: Take off contaminated clothing and wash before reuse. Dispose of contents/ container to an approved waste disposal plant

Other References

Harmonized Tariff Code


  • A11156

    Trichloroacetic acid, 99%
  • A16295

    Tetramethylurea, 99%
  • 11155

    Germanium(IV) oxide, Puratronic®, 99.999% (metals basis)
  • 40116

    Phosphotungstic acid hydrate
  • 43354

    3-Hydroxybutyric acid, tech.

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