What it is
Triceteareth-4 phosphate is an ethoxylated cetearyl alcohol phosphate ester that functions as an emulsifier, helping oil and water phases blend into a stable emulsion. It is used in creams, lotions, and sun care emulsions to build and stabilize the formula. As a mild phosphate-ester emulsifier, it contributes to a pleasant, well-structured texture.
Safety & warnings
Generally well tolerated as used in cosmetic emulsions. It is not a recognized fragrance allergen; as with many surfactants, irritation is possible at high levels but uncommon in finished, balanced formulas.
Origin & sourcing
Synthetic; manufactured by ethoxylating and phosphating cetostearyl alcohol, where the fatty alcohol portion can be of plant or petrochemical origin.
Questions everyone asks
What is the role of triceteareth-4 phosphate?
It is an emulsifier that helps oil and water mix into a stable cream or lotion, and it helps keep the emulsion from separating over time.
Is it a UV filter?
No. It is a formulation aid that stabilizes the emulsion and does not contribute to UV protection.