Namely
The disodium pyrophosphate is in the form of a white crystalline powder. In cosmetics, it is used as a buffering agent, chelator and anti-corrosive.
Its functions (INCI)
Anticorrosive : Prevents corrosion of the packaging
pH regulator : Stabilises the pH of cosmetics
Chelating : Reacts and forms complexes with metal ions that could affect the stability and / or appearance of cosmetic products