Properties: Oxalic acid forms colourless crystals, readily soluble in water, with light nitrogen oxides-like odour. Oxalic acid dihydrate begins to dissociate at temperature over 30 ℃. If heated quickly, it melts at 101.5 ℃,anhydrous oxalic acid melts at 180 ℃.

Applications: Purifying agent in pharmaceutical industry, special in antibiotic medication, such as Oxytetracycline, Chloramphenicol , etc.
Precipitating agent in Rare-earth mineral processing;
Bleaching agent in the textile activities, wood pulp bleaching;
Rust-remover for Metal treatment;
Grinding agent, such as Marble polishing;
Waste water treatment, removing calcium from water.