Chemical Specifications Appearance Clear colorless solution with strong pungent odor Assay (acidimetric) 37 - 41% w/v Weight/ mL at 20°C 1.080 - 1.090 g Content of methanol 8 - 12% w/w Acidity Max 3 ml N% Ash content Max 0.02% Chloride (Cl) Max 0.001%