Structural formula Specification Relative molecular weight : 90.08 CAS No.: 616-38-6 UN No.: 1161 Class: 3.2 Quality indexes Item Top class First class Appearance Colorless&transparent liquid Colorless&transparent liquid Content e99.9% e99.5% Methanol d0.02% d0.1% Moisture d0.02% d0.1% Acidity (CH3COOH) d0.015% d0.015% Free chlorine d0.01% d0.01% Color (APHA) d5 d10 Packing Packed in galvanized iron drums or ISO tank.