sodium tripolyphosphate - 53

Product name: STPP;tripolyphosphate;sodium tripoly phosphate;
Chemical formula: Na5P3O10
Molecular weight: 367.86
CAS No. 7758-29-4
Appearance: white microdot with luster
Melting point : 622 degree centigrade
Solublity：easily soluble in water, with remarkable chelating ability to some metal ions such as Ca2+, Mn2+;
Standard executed: GB9983-88
Specification:
index Technical grade Food grade
Main content 94.0%min 94.0%min
P2O5 57.0%min 57.0%min
Water insoluble 0.1%max 0.05%max
Iron as Fe 0.015%max 0.01%max
Ph of 1%water solution 9.2-10.0 9.5-10.0
Density(g/cm3) 0.8-1.0 0.8-1.0
Heavy metal as Pb 0.001%max
Arsenic,as As 0.0003%max
Fluoride,as F 0.003%max
Chloride,as Cl 0.025%max
Application:
1. used as main auxiliary of synthetic wash,soap synergistic agent,water softener,leather pre-tanning agent,dye suxiliary agent,as dispersant of suspension such as paint,kaolin magnesium oxide,calcium carbonate drilling mud,and as preservative agent for paper making,organic synthesis catalyzer;
2. used in epuration of petroleum product,gum latex storage,as dispersant,solvent in metal industry and pharmaceutical industry;
3. also widely used in gum synthesis,foodstuff industry,and poultry process
packaging:25kg in plastic woven bag with polythene liner;stored in ventilated and dry place.