Specification of itaconic acid Items Specifications Purity, % 99.6 Min Loss on drying, % 0.3 Max Residue on ignition, % 0.01 Max Heavy metal（Pb）, μg/g 10 Max Fe, μg/g 5 Max Cu, μg/g 1 Max Mn, μg/g 1 Max As, μg/g 4 Max Sulfate, μg/g 30 Max Chloride, μg/g 10 Max Melting point, ℃ 165~168 Colour, APHA 5 Max Clarity（5% water solution） Cloudless Clarity（20% DMSO） Cloudless Particle size, retained on 16 US mesh 15.0Max Particle size, through 200 US mesh 6.0Max