Ammonium metatungstate powder (molecular formula H₂₈N₆O₄₁W₁₂, AMT), as a key intermediate in tungsten chemical industry, exhibits a white appearance resulting from the combined effects of its molecular structure, electronic transition characteristics, and crystal physical morphology.

Ammonium metatungstate (AMT) and ammonium paratungstate (APT) are both important tungsten compounds, classified as ammonium salts of tungsten. They contain tungsten (W), nitrogen (N), hydrogen (H), and oxygen (O), and are commonly used in the preparation of downstream products such as tungsten trioxide and tungsten powder. However, they differ in chemical composition, physicochemical properties, production processes, and applications.

Although both ammonium metatungstate (AMT) and ammonium heptamolybdate (AHM) are important transition metal compounds with wide applications in the chemical industry, they differ in terms of chemical composition, molecular structure, physical and chemical properties, production technologies, and specific applications.

The purity of Ammonium Metatungstate is typically categorized based on the application scenario: