Properties: Oxalic acid forms fine colourless crystals, readily soluble in water, with light nitrogen oxides-like odour. Oxalic acid dihydrate begins to dissociate at temperature over 30 ⁰C. If heated quickly, it melts at 101.5 ⁰C, anhydrous oxalic acid melts at 180 ⁰C. 

Use:

·   Precipitating agent in Rare-earth mineral processing;

·   Bleaching agent in the textile activities, wood pulp bleaching;

·   Rust remover for Metal treatment;

·   Used in commercial rust removers to remove rust stains from tubs and sinks.

·   Grinding agent, such as marble polishing

·   Waste water tratment, removing calcium in water.

·   Use in cleaning and sterilizing homebrewing equipment.

·   Useful as a reducing agent for photography and ink removal

·   Used as purifying agent in pharmaceutical industry

·   Rrock collectors,clean mineral specimens

·   Remove food and rust stains from kitchen countertops, plumbing fixtures and fabric