... fine crystal or powder, easily soluble in water; absorb moisture; odorless, non-toxic.Use: widely used in vinylon, sodium silicate, bleaching, glass, ... , the making of sodium sulphide, water glass, or used in papermaking, glass, dye and used as filler, dyeing auxiliary, ... laxative, antidote, t also can be used in fiber, lether, metallurgy, enamel and soap.CERTIFICATE OF ANALYSIS ...