white powder of fine crystal Widely used in manufacturer of chemicals and metallurgy, medicine, petroleum,hides processing,textile, printing and dyeing, foodstuff, photograph,glass and paper industry,etc. as well as for purification of water. Specific Na2CO3 %(dry basis)≥99.1 NaCL%≤0.7Fe%≤0.003Water Insoluble %≤0.02Na2CO3%(wet basis)≤98.6