... , with light nitrogen oxides-like odour. Industry Standard: Oxialic AcidProperties: Oxalic acid forms fine colourless crystals, readily soluble in water, with light ... 0C. If heated quickly, it melts at 101.5 0C,anhydrous oxalic acid melts at 180 0C.Applications: Purifying agent in pharmaceutical industry ... liner film,good properties of waterproof and avoid water, solarization; Oxalic Acid