Conform with the standard of fcc iv Appearance : white granular or powder Assay(c6h7o2k) 99.0%-101.0% Acidity or alkalinity _1.0% Heavy metal(as pb) _10 ppm Arsenic(as as) _2 ppm Mercury(as hg) _1 ppm Loss on drying (105pc 3 hours) _1.0% Aldehydes(as hcho) _0.1% Melting point 133-135pc Lead _5ppm Clarify : conform.