Ammonium dimolybdate

English Name: ammonium dimolybdate

CAS No.: 27546-07-2

Molecular formula: H8Mo2N2O7

Molecular weight: 132

EINECS No.: 248-517-2

Application: it is mainly used as raw material for preparing molybdenum powder, ceramic pigment and other molybdenum compounds. It is also used for smelting ferromolybdenum and preparing molybdenum trioxide and metal molybdenum powder as raw materials of tungsten molybdenum alloy and molybdenum wire; Secondly, it is used as catalyst in chemical industry; A small amount is used as agricultural molybdenum fertilizer; A very small amount is used in medicine, which is the component of a variety of enzymes, petroleum cobalt and molybdenum catalysts, pigment chemicals and trace chemical fertilizers. There are also a few powder metallurgy enterprises using ammonium heptamolybdate as raw materials.

Properties

Ammonium dimolybdate (ADM) is the inorganic compound with the formula (NH4)2Mo2O7. It is a white, water-soluble solid. ADM is an intermediate in the production of molybdenum compounds from its ores. Roasting typical ore produces crude molybdenum(VI) oxides, which can be extracted into aqueous ammonia, affording ammonium molybdate. Heating solutions of ammonium molybdate gives ADM. Upon heating the solid, ammonium dimolybdate decomposes to molybdenum trioxide: (NH4)2Mo2O7 → 2 MoO3 + 2 NH3 + H2O In terms of its chemical structure, it is a polymeric consisting of distorted octahedral Mo centers liked by tetrahedral molybdate centers.

CAS No.

27546-07-2

Formula

H8Mo2N2O7

Molecular Mass

339.99300

Exact Mass

343.84400

PSA

124.45000

Logp

-0.24940