≤0.0001% free alkali (as NH3)
≤0.0001% heavy metals (as Pb)
≤0.0003% KMnO4 red. matter (as O)
≤0.0005% free acid (as CH3COOH)
≤0.001% acetone (GC)
≤0.001% aldehydes (as CH3CHO)
≤0.001% non-volatile matter
≤0.003% 2-propanol
≤0.003% carbonyl compounds (as CO)
≤0.02% methanol (GC)
≤0.05% iso-amyl alcohol
≤0.2% water (Karl Fischer)