... soluble in water, with light nitrogen oxides-like odour. Oxalic acid dihydrate begins to dissociate at temperature over 30 °C. If ... heated quickly, it melts at 101.5 °C,anhydrous oxalic acid melts at 180 °C.Applications:Purifying agent in pharmaceutical industry ... .We are chemical manufacture in Tianjin City,China mainland.We can provide you chemical products such as Oxalic Acid,Caustic Soda,Paraffin ...