Ammonium Dichromate

Ammonium Dichromate

Ammonium Dichromate
Pictures are for illustrative purposes only. Actual product may vary Add to Quote
  • Diazanium oxido-(oxido(dioxo)chromio)oxy-dioxochromium
  • 2841.50.10
  • (NH4)2Cr2O7
  • Orange-red, needle-shaped crystals
  • 7789-09-5
  • Ammonium bichromate
  • 25 kg bags
    50 kg iron drums
Grade Origin Download

Brief Overview

Ammonium dichromate, also known as ammonium bichromate, has the chemical formula of (NH4)2Cr2O7. It is also sometimes known as “Vesuvian Fire”, due to its use in demonstrations as tabletop volcanoes. However, due to its carcinogenic nature, its used in schools has decreased in popularity over the years. This compound exist as orange-red, needle-shaped crystals at normal room temperature and pressure. It is also soluble in water and alcohol.\


Manufacturing Process

It can by synthesized by adding chromic acid to ammonium hydroxide, followed by crystallization. Alternatively, it can be prepared by reacting sodium dichromate with ammonium chloride.

Laboratory Uses

It is commonly used as a source of pure nitrogen in the laboratory, and occassionaly, as a catalyst.


Other applications

Ammonium dichromate is also used as a mordant for dyeing pigments, in the manufacturing of alizarin, leather tanning, chrome alum, and in oil purification.

Free quote