HomeSODIUM NAPHTHIONATE 98% EXTRAPURE SODIUM NAPHTHIONATE 98% EXTRAPURE Product Code B-02456 Grade EXTRAPURE Purity 98 % Brand Bio-Chem Molecular Formula C10H8NNaO3S CAS No. 130-13-2 Molecular Weight 245.23 H.S.Code 2921.45160 Shelf Life 60 Months COAs MSDS Physical Properties Physical state at 20 °C Solid Colour White to off white Odour Odorless Packaging Specification AppearanceBrownish gray color crystalsAssay (GC area %)Min 98%Water (H2O)Max 3.0% Safety Information and Hazard Symbols Symbol: GHS02 , GHS03, GHS05 ,GHS08Signal Word: Danger