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 *0 0C. If
heated quickly, it melts at **1.5 0C,anhydrous oxalic acid melts at
**0 0C.
Specification :
index Wonderful grade First grade Up to grade
purity% ≥ *9.6 *9.4 *9.0
suiphate group % ≤ 0.*8 0.*0 0.*0
ignition (**0oC) % ≤ 0.*8 0.*0 0.*0
heavy metal % ≤ 0.**1 0.**2 0.*2
Iron content % ≤ 0.***2 0.**2 0.*1
chlorides % ≤ 0.**3 0.**4 0.*1
calcium % ≤ 0.***2 / /
