Kojic acid Purity(%) 99.0 min Melting point(deg c) 152-155 Loss on drying(%) 0.5 max Ignition residue(%) 0.1 max Chloride(%) 0.005 max Heavy metals(%) 0.001 max Arsenic(%) 0.0001 max Iron(%) 0.001 max In tinfoil bag: 1.0kg/bag, 5.0kg/bag, 25.0kg/dump, etc.