Product identification: Cas no.: 10213-79-3 Formula: na2sio35h2o Molecular weight.: 122.06 Un no.: 3253 Specification: industrial grade 0.001%=10ppm Itemgranularpowder Sodium oxide(na2o) 28.00-30.0028.50-30.00% Silica(sio2)27.00-29.0027.30-29.20% Water insoluble0.20.2% max Iron(fe)% : 0.03 0.03% max Whiteness7575%min Particular size(through16í¬30mesh)90%max Ph(1%solution) 12.5+ -1.012.5+ -1.0 25kg/50lb pp woven bags, kraft paper bag or polythene bag, with pe liner 1mt/2000lb super sack, with pe liner.