... can be used as ingredient and additive in all kinds Potassium Pyrophosphate molecular formular:K4P2O7,molecular weight:330.34, appearance:white block ... or powder grain, potassium pyroborate ( K4P2O7):96%min,total phosphonium (P2O5):41%min,Fe ... .01%max, Packing:25kgs plastic woven bags, 22mts/20'fcl Potassium Pyrophosphate