Vanadyl sulfate

Vanadyl sulfate (CAS 27774-13-6), also sold as VOSO4, is an inorganic vanadium(IV) salt used as a catalyst precursor and active vanadium source.

Where is Vanadyl sulfate used?

• Catalyst manufacturing: precursor for supported vanadium oxide catalysts in oxidation and sulfuric acid production
• Vanadium redox flow battery electrolyte preparation: producing or conditioning the vanadium electrolyte solution
• Mining and hydrometallurgy: process intermediate in vanadium recovery and refining
• Pharmaceutical and nutraceutical manufacturing: active ingredient in vanadium-based dietary supplement formulations for metabolic support research
• Metal surface treatment solutions.
• Coloring in some ceramic glazes.

Formulation notes

• One of several distinct vanadium forms offered, alongside sodium metavanadate, bis(maltolato)oxovanadium(IV), vanadyl acetylacetonate and vanadium amino-acid chelate.

Typical specification

• Available in USP, NF, BP, Ph Eur, pure, reagent, FCC food grade, and mineral fortifier grades.
• Minimum assay of 97.00%.
• Pentavalent vanadium content 0.5% maximum; batch result 0.31%.

Regulatory status

• Classified as UN 2931 6.1 / PGII for transport.
• Not included in the EU list of vitamins and minerals that may be used in certain foods including food supplements.
• Continued use in EU member states is allowed under national derogations following submission of safety data assessed by EFSA.

Storage, packaging and handling

• Hydrate should be kept in a tightly closed container at ambient temperature, protected from moisture, oxidizing agents and incompatible materials.
• Stable but incompatible with strong oxidizing agents.

Frequently asked questions about Vanadyl sulfate

What is the pH of vanadyl sulfate?

Vanadyl sulfate has a pH between 2 and 3.

What is the elemental vanadium content in vanadyl sulfate?

Vanadyl sulfate has an elemental vanadium content of approximately 31% in the anhydrous form.

Technical content is compiled and updated by the SoleChem product team from public technical sources; the certificate of analysis (COA) governs product-specific specifications.