≤0.001% formaldehyde (HCHO)
≤0.1% methanol (CH3OH)
substances darkened by H2SO4, in accordance
KMnO4-reducing substances, in accordance
≤0.002% free acid (as CH3COOH)
≤0.001% aldehyde (as CH3CHO)
≤0.0004% free alkali (as NH3)
≤0.2% water
≤0.001% ketone (as CH3COCH3)