Oxalic acid forms fine colourless crystals, readily soluble inwater , with light nitrogen oxides-like odour. Oxalic aciddihydrate begins to dissociate ate temperature over 30 degreecentigrade.

It mainly applied in the following fields:

1. Purifying agent in pharmaceutical industry, special inantibiotic medication such as oxytetracycline, chloramphenicol ,etc;

2. Precipitating agent in Rare-earth mineral processing;

3.Bleaching agent in the textile activities, wood pulpbleaching;

4.Rust-remover for metal treatment;

5. Griding agent,such as Marble POLISHING;

6. Waste water treatment, removing calcium from water.