Calcium tungstate

Calcium tungstate (CAS 7790-75-2), also referenced commercially as C.I. 77250, is an inorganic calcium salt of tungsten used as a functional material in specialized industrial and electronic applications.

Where is Calcium tungstate used?

• Mining and metallurgy: ore concentrates processed to recover tungsten metal and intermediates for hard alloy and tooling production
• Scintillation: luminescent response to X-ray and gamma radiation for detector components and imaging screens
• Electronics: substrate or functional material in thin-film and optical device manufacturing
• Specialty coatings: pigment under C.I. 77250 where controlled luminescence or whiteness is required
• It occurs naturally as the mineral scheelite, a primary source mineral for tungsten extraction.

Good to know: Synthetic grades are distinguished from natural scheelite concentrates, which are ore fractions.

Commercial specifications

• White crystalline powder in varying particle size distributions
• Technical and high-purity grades
• Purity levels typically 99% or above for electronic and scintillation uses