Sodium Tripolyphosphate (STPP)

Airedale Chemical Sodium Tripolyphosphate (also known as STP, STPP or sodium triphosphate) holds the formula Na5P3O10 and is an organic compound within a variety of domestic and industrial products, especially detergents.

STPP is commonly used as a water softener which makes it prime for use in the detergents and cleaning industry. One big advantage of Sodium Trioluphosphate is that it has little to no impact on the environment and has a extremely low toxicity level.

Sodium Tripolyphoshate is supplied as a solid, a white powder with no distinguishing odour. If you are looking to buy STPP, manufacturers Airedale Chemical supply the white powder in 25kg bags to businesses in all industries across the UK and internationally.

Other names: Sodium Tripolyphosphate, Polygon, STPP

Grade: TECH

This product is available in the following sizes

  • 25kg Bag Solid/Powder only chemicals


Detergent & Cleaning

Holds various applications in detergents, the majority of STPP is consumed as a component of commercial detergents.

Food & Beverage

STPP is recognised as a safe ingredient for food and beverages and therefore is commonly found in food production as E number E451. The E451 chemical is a preservative for human foods such as seafood, meats, poultry, as well as commonly being found in animal feeds.


Used within the textile industry as a leather tanning agent and on other materials for flame retardants. As STPP has a low toxicity level and is non-flammable it makes it a great option for the textile industry.

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