... competitive price 3, 25 KG export package 4, Manufcturer 1. Sodium Tripolyphosphate( STPP)-Industry Grade with fine powder and ... for synthetic detergent, synergist for soap, water softner, tanning agent for leather making, auxiliary for dyeing ... for suspension solutions of coating, kaolin, magnesium oxide,calcium carbonate and drilling mud etc. Analysis Standard:GB/T9983-2004Purity as Na5P3O10 : 94 ...