Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

Sodium tripolyphosphate is a solid, inorganic compound present in the form of slightly hygroscopic granules or powder. The stable form of STPP is the hexahydrated salt.

Impurities of sodium tripolyphosphate may include sodium pyrophosphate, sodium orthophosphate and sodium metaphosphate. Typical analysis give :

STPP 95 %

Pyro + Ortho + Metaphosphate 2 %

The impurity profile depends of the production process and the composition of the raw materials.