Sodium Polyphosphate

Sodium polyphosphate is an inorganic salt composed of multiple linked phosphate units. It functions primarily as a chelating agent in cosmetic formulations, meaning it binds to metal ions and minerals that might otherwise destabilise a product or affect its efficacy.This ingredient is used behind the scenes in skincare to improve formula stability and performance rather than to deliver a direct benefit to the skin itself. It's one of several polyphosphate salts used in cosmetics, each with slightly different molecular structures and applications.

Sodium polyphosphate works by chelating, a process in which its molecular structure wraps around metal ions (such as iron, copper or calcium) and holds them in a stable form. This prevents these minerals from triggering unwanted chemical reactions in the product, such as oxidation or ingredient breakdown.In skincare formulations, this behind-the-scenes action helps preserve the integrity of the formula, allowing actives to remain effective for longer and ensuring a consistent texture and appearance throughout the product's shelf life.

Sodium polyphosphate is not an active ingredient you need to think about using strategically. It works passively within the product formulation. Simply use your skincare product as directed, and the chelating action happens automatically to keep the formula stable and effective.

Sodium polyphosphate is generally recognised as safe in cosmetic formulations at typical use levels. No specific cautions for topical skincare use have been identified in standard safety assessments.