Cetyl Phosphate

Functions
Emulsifier
Detergent
Emulsion stabilizer
Thickener
Gloss enhancer
CAS Number(s)
3539-43-3
EINECS number(s)
222-581-1
FDA UNII
VT07D6X67O

Cetyl Phosphate is a hexadecyl dihydrogen phosphate ester, an oil-soluble waxy white flake with a melting point of 68°C. It is a highly effective anionic oil-in-water emulsifier supplied in acid form. This means that the tailor-made salts required for the final formulation can be created individually via partial neutralization with various bases. The acid form is oil-soluble; neutralized salts are water-soluble.

Cetyl Phosphate is generally used as a co-emulsifier with low HLB nonionics and is non-irritating to the skin. At low-use concentrations, it enhances the stability of emulsions and thickens cremes and lotions. It can replace TEA-stearate in most preparations.

As a primary emulsifier, Cetyl Phosphate performs well at normal skin pH. At low concentrations, it effectively increases viscosity and aids in stabilizing the emulsion system. Formulations containing Cetyl Phosphate display enhanced shear, heat, and freeze-thaw stability.

Cetyl Phosphate also enhances the glossy appearance of cosmetic cremes. It is used in oil-in-water creams and lotions, which contain a broad spectrum of oils and emollients. Cetyl phosphate is especially suited for stable, water-resistant sun-care formulations and many dermatological and personal care products. In addition, it does not contain ethoxylated parts for PEG-free formulations.
Synonyms
Hexadecyl dihydrogen phosphate
Hostaphat® CC 100
Arlatone® MAP 160

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