We supply China quality sodium metasilicate pentahydrate, granular with the following specification:
Na2o 28.1-29.5 % sio2 27.8-29.2 % fe 100 ppm max
Ph (1 % at 20) 12.4-12.6 water insolubles 0.02 % max
Loss on ignition 42-44 % size 93 % min within 200um-1250um