Oxalic acid Name: Oxalic acid Synonyms: Ethidic acid, oxalic acid hydrated (dihydric) Genre: Clean Purity: Pure 99.6% Chemical formula: C2H2O4 x 2H2O Oxalic acid is used: - for removing rust, - in electrical engineering as an auxiliary agent for electrolytic oxidation of aluminum (Eloxal), - in titration analysis as a reference substance for setting the titres of oxidizing solutions, - in beekeeping for the control of Varroa destructor mites (varroses), - for removing ink stains, - in dyeing and powders for cleaning sanitary devices, - for wood whitening and renovation.