oxalic acid

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.
3.Specification:
Items Spec
TOTAL ACIDITY %≥ 99.6
ASH %≤ 0.1
IRON ≤ 0.02
LOSS ON IGNITION %≤ 0.08
SULFATE%≤ 0.1
CHLORIDE ppm≤ 20
HEAVY METAL ppm≤ 10