CAS NO.10102-17-7 MW:248.17EC NO.:MF: Na2S2O35H2OPacking: 25Kg or 50Kg composite plastic bag with inner filmProduct descrtiption:white monoclinic system crystal, odorless; relative density 1.729(17??)??m.p.40??45??; will lose water at 100??; easily soluble in water(week acid); easy efflorescence at 33??above; deliquesce in humid air. Use:Mainly used as dechlorinating agent and printing & dyeing auxiliaries and fixing solution; also used in pharmacy, pesticides, leathers, textiles, paper making etc; it can also be used as reducing agent, bleaching agent and antidote.