Trisodium phosphate, commonly known as TSP or trisodium phosphate dodecahydrate, is a common cleaning agent. It is a white, water-soluble powder with the formula Na3PO4·12H2O. In solution, it is a strong base and can be used as a cleaning agent, emulsifier, and water softener.

Trisodium phosphate is a relatively safe chemical, but it can cause skin irritation and eye damage. It is important to wear gloves and eye protection when using trisodium phosphate.

Trisodium phosphate is used in a variety of cleaning applications, including:

* Cleaning ovens

* Degreasing engines

* Removing stains from clothing

* Cleaning carpets and upholstery

* Cleaning grout and tile

* Removing mildew and mold

* Water softening

Trisodium phosphate can also be used as a flux in soldering and as a food additive.