Item Glacial acetic acid tech grade apperance Colorless transparent liquid purify 99.0% min 99.5% max acetaldehyde 0.05% max 0.05% max Formic acid 0.003% max 0.003% max iron 0.0002% max 0.0001% max Residue on evaporation 0.02% max 0.02% max Heavy metals( Pb) 0.0002% max 0.0002% max Sp.gr.( 20/ 4C) g/ cm / 1.049-1.056 Freezing point / 16 Sulfate 0.0003% max 0.0005% max chloride 0.0003% max 0.0004% max