The CIR Expert Panel concluded that the following 31 ingredients are safe in the present practices of use and concentration in cosmetics as described in this safety assessment, when formulated to be non-irritating...Sodium Metaphosphate...
Solubility White powder. Practically insol in water and in aq solns of pyrophosphates and hexametaphosphates. Sol in mineral acids. Does not form complexes with Fe(II), Fe(III), U(IV) salts. /Maddrell's salt (polymeric sodium metaphosphate)/
Formula
NaO3P
Mol. Weight
101.96
CAS #
10361-03-2, 50813-16-6
Form
Powder
State
White solid, practically insoluble in water; [Merck Index]
See origin →
Functions
Buffering
Chelating
Grabs onto metal ions in water that would destabilize the formula. Keeps your product from going bad or changing color.
Oral Care
Stabilizes pH
Removes Metal Ions
Antioxidant Protection
Reduces Inflammation
Locks In Moisture
Supports dental health, Maintains optimal pH, Binds metal ions
Traditional Use
Synthesized in the 20th century as a sequestrant and buffering agent developed to stabilize cosmetic formulations and improve their shelf-life by preventing mineral interactions.