[soh-dee-uh m dahy-kroh-meyt orsoh-dee-uh m bahy-kroh-meyt] /ˈsoʊ di əm daɪˈkroʊ meɪt or ˈsoʊ di əm baɪˈkroʊ meɪt/
a red or orange crystalline, water-soluble solid, Na 2 Cr 2 O 7 ⋅2H 2 O, used as an oxidizing agent in the manufacture of dyes and inks, as a corrosion inhibitor, a mordant, a laboratory reagent, in the tanning of leather, and in electroplating.
British Dictionary definitions for sodium bichromate
a soluble crystalline solid compound, usually obtained as red or orange crystals and used as an oxidizing agent, corrosion inhibitor, and mordant. Formula Na2Cr2O7Also called (not in technical usage) sodium bichromate