chromic acid

an acid, HCrO, existing only in solution or known in the form of its salts

See chromic acid in American Heritage Dictionary 4

noun
  1. A corrosive, oxidizing acid, H2CrO4, occurring only as salts or in solution.
  2. The anhydride of chromic acid, CrO3, a purplish crystalline material that reacts explosively with reducing agents and is used in chromium plating, as an oxidizing agent, and to color glass and rubber.
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