Ammonium chromate ((NH4)2CrO4)-Crystalline

Characteristic




Ammonium chromate is a salt with the formula (NH4)2CrO4. It forms yellow, monoclinic crystals; made from ammonium hydroxide and ammonium dichromate; used in photography as a sensitizer for gelatin coatings. 




Chemical formula:(NH4)2CrO4

Molar mass:152.07 g/mol

Appearance:yellow crystals

Density:1.90 g/ml

Melting point:185 °C (365 °F; 458 K) decomposes

Solubility in water:24.8 g/100ml (0 °C);37.36 g/100ml (25 °C);45.3 g/100ml (40 °C);70.06 g/100ml (75 °C)




Application




Ammonium chromate is a reagent for the preparation of a solid heterogeneous oxidizing agent for liquid phase oxidation of alcohols. Also used in in photography, textile printing, and fixing chromate dyes on wool; Also used as an analytical reagent, catalyst, and corrosion inhibitor.