Molybdic Acid (85%*) is a white, crystalline powder, only slightly soluble in water until the addition of Ammonium Hydroxide which significantly increases the solubility. It is a high purity compound. The designation "(85%)" refers to the minimum MoO3 content in the product.

* - Molybdic Acid (85%) can be made by the thermal dehydration of Ammonium Heptamolybdate (NH₄)₆Mo₇O₂₄·4H₂O. The Molybdenum Trioxide (MoO₃) analysis of the typical product, 86-88%, suggests the formula (NH₄)₆Mo₇O₂₄, which contained 86.6% MoO₃. The formula listed by CAS corresponding to the CAS Number is H₂MoO₄. However, this is inconsistent with the American Chemical Society Specifications for the product. “Reagent Chemicals”, Eighth Ed., American Chemical Society, Washington, D.C. 1993 states that Molybdic Acid (85%) “consists largely of Ammonium Molybdate”. Ammonium Heptamolybdate Anhydride is consistent. Molybdic Acid (85%) is not soluble in water as is Ammonium Heptamolybdate, but like Molybdenum Trioxide, it is soluble in dilute Ammonium Hydroxide.

Please refer to the Specification Sheet for more information.

Download Specification Sheet (PDF)

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