a soluble crystalline solid compound, usually obtained as red or orange crystals and used as an oxidizing agent, corrosion inhibitor, and mordant. Formula Na2Cr2O7
Also called (not in technical usage): sodium bichromate
sodium dichromate in American English
a red, crystalline salt, Na2Cr2O7, used as an oxidizing agent, corrosion inhibitor, antiseptic, etc.