Sodium Tripolyphosphate(STPP)

Chemical formula:Na5P3O10
CAS Number:7758-29-4
Standard executed:GB9983-2004(Tech Grade)QB1034-1991(Food Grade)
Packing and storage:In 25kg,50kg,1000kg net bags,store at a cool,dry and well ventilated place.
Properties:White microdot powder with luster, melting point at 622, easily soluble in water, with remarkable chelating ability to some metal ions such as Ca2+ ,Mg2+ ,can soften hard water, change suspension into solution, alkalescent, without corrosiveness.
Uses:Used as one of the main auxiliaries for synthetic detergent,synergist for soap;water softener,tanning agent for leather making,auxiliary for dyeing;As an effective dispersion agent for suspension solutions of coatings,kaolin,magnesium oxide,calcium carbonate and driling mud etc.
Specifications:
1.Tech Grade:
Assay Na5P3O10:94% min
P2O5:57% min
Water insoluble:0.1% max
PH value of 1% solution:9.2-10.0
Iron(Fe):0.01% max
Whiteness:90% min
2.Food Grade
Assay Na5P3O10:95% min
P2O5:57% min
Water insoluble:0.05% max
PH value of 1% solution:9.5-10.0
Iron(Fe):0.01% max
Heavy metals:10ppm max
Fluoride:30ppm max
Arsenic:3ppm max
Whiteness:90% min
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