(chemistry) any salt of dichromic acid; in solution the orange dichromate anion (Cr₂O₇²⁻) is in equilibrium with the yellow chromate anion (CrO₄²⁻), the relative amount of each ion depending on the pH; they are both very powerful oxidizing agents

plural of dichromate

dichromatism

furnishing or giving two colours; said of defective vision, in which all the compound colours are resolvable into two elements instead of three / containing two atoms of chromium

(chemistry) A potassium salt of chromic acid, K₂Cr₂O₇; the orange crystals are soluble in water, and it is used as an oxidizing agent and in photography.

plural of potassium dichromate

(inorganic chemistry) A relatively unstable form of chromic acid, H₂Cr₂O₇, known only in solution or as its salts, the dichromates, from which it may be prepared.