In microbial determination of Niacin 25 gmC5H5N5 M.W. 135.13 1 kgAssay min 99.0%Identification passes testAppearance of soln passes testAcidity or alkalinity passes testRelated substances passes testChloride (as Cl) max 0.01%Sulphate (SO4) max 0.03%Ammonium (NH4) max 0.001%Heavy metals (as Pb) max 0.001%Loss on drying max 0.5%Residue on ignition max 0.1%Organic volatile impurities passes testResidual solvents passes testNitrogrn content 50.2 -53.4%