Sodium Tripolyphosphate

Alternate Names: Sodium Triphosphate, STPP

Oxide	Analysis	Formula
Na2O	42.10%	0.62
P2O5	57.90%	0.38
Oxide Weight		91.99
Formula Weight		91.99

Notes

Used as a source of sodium in the glass industry. The reaction is: 2 Na5P3O10 ----> 5 Na₂O + 3P₂O₅

STPP is also used in glazes and engobes as a deflocculant (to reduce water content).

Related Information

Links

Typecodes	Flux Source Materials that source Na2O, K2O, Li2O, CaO, MgO and other fluxes but are not feldspars or frits. Remember that materials can be flux sources but also perform many other roles. For example, talc is a flux in high temperature glazes, but a matting agent in low temperatures ones. It can also be a flux, a filler and an expansion increaser in bodies.
Oxides	P2O5 - Phosphorus Pentoxide
URLs	https://en.wikipedia.org/wiki/Sodium_triphosphate Sodium TriPolyphosphate at Wikipedia

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