Specifications Appearance White crystalline powder/Granular Identification 1. confirms 2. Ammonia is evolved recognized by odor 3. Yellow color develops Melting Point Between 128oC to 131Oc Loss on drying at 105oC < 0.5% w/w Residue on Ignition < 0.1% Heavy Metals 99.0 % and < 101.5% Impurity content :Niacin Cometics grade NMT 100ppm Pharma grade No Limit