Chemical Specifications Appearance Colorless crystals Assay (on anhydrous basis) Min 98% Water (by KF) 12 - 16% Melting point of isolated saccharin Min 226 deg C Free acid Max 0.5 ml N% Free alkali Max 0.5 ml N% Arsenic (As) Max 0.0002% Lead (Pb) Max 0.001%