Oxalic Acid Content

99.6% Min

Sulphate (SO₄^2-)

0.005% Max

Heavy metal (Pb²⁺)

0.001% Max

Ferrous (Fe³⁺)

0.0015% Max

Chloride (Cl^-)

0.003% Max

Ignition residues (850^oC)

0.05% Max