Ammonium Dichromate (NH4)2Cr2O7 Ammonium dichromate has important uses in photography, used as an alternative to potassium dichromate,  it is a common inorganic chemical reagent. Gum bichromate printing Carbon print to harden gum and gelatine when exposed to ultraviolet light. Used in the bleach solution in bromoils. Handle with care: it is carcinogenic and corrosive Handle with gloves, eye protection and[…]