residual solvents, complies
reducing matter, complies
≤0.002% free alkali (as NaOH)
≤0.2% water (Karl Fischer)
acidic reac. impurities, complies
oxidizing substances, complies
≤0.003% free acid (as CH3COOH)
organic volatile impurities, complies (GC)
≤0.0005% heavy metals (as Pb)