Ammonium dichromate is a flammable inorganic compound with the chemical formula (NH4)2Cr2O7.Ammonium dichromate is orange-red needles produced during crystallization. A toxic chemical salt is used to sensitize organic emulsions such ad gelatin to the hardening effect of actinic light. It is more sensitive to light.

Properties

Chemical Formula : (NH4)2Cr2O7

Appearance : Orange-red crystals

Odour : Odourless

Density : 2.12 g/cm³

Molecular Weight/ Molar Mass : 252.07 g/mol

Autoignition temperature : 190 °C

Melting point : 180 °C

Solubility : Insoluble in acetone; soluble in alcohol

Uses of Ammonium Dichromate – (NH4)2Cr2O7

Ammonium dichromate is used in sensitizing solutions used in lithography.

Used in pyrotechnics, lithography and photoengraving. It is also used as a magnetic recording material.

It is used as an approved pesticide and used as a mordant for dyeing, used as a pigment.