(organic chemistry) K2C2O4·H2O Odorless, efflorescent, water-soluble, colorless crystals; decomposes when heated; used in analytical chemistry and photography and as a bleach and oxalic acid source.
A dentin desensitizing agent that occludes the openings of the dentinal tubules and blocks the hydrodynamics that initiate the pain response. Brand name: Protect.