Namely
Disodium Phosphate is a synthetic ingredient, it is used as a laxative. It is also used in the manufacture of enamel and ceramics for dentists. In cosmetics, it is used for its descaling and masking properties.
Its functions (INCI)
Anticorrosive : Prevents corrosion of the packaging
pH regulator : Stabilises the pH of cosmetics
Masking : Reduces or inhibits the odor or basic taste of the product