Food grade tech grade sodium tri-polyphosphate 1.White powder 2.GB9983-88 ... ,Food cert 4.Packing:by 25kgs/woven bag Food grade tech grade sodium tri-polyphosphate1.White powder2.GB9983-883.ISO,Food ... Density0.4-1.0 g/m3.minWhiteness90%min Food grade tech grade sodium tri-polyphosphate