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| Catalog Number | CI-SC-0220 |
| Product Name | Cetyl Phosphate |
| CAS | 3539-43-3 |
| Structure |  |
| Synonyms | 1-Hexadecanol, 1-(dihydrogen phosphate) |
| Description | Anionic oil-in-water emulsifier made of long chain organic phosphate esters supplied as a free acid in dry form. Used primarily as co-emulsifier together with low HLB non-ionic emulsifiers. Mild and non-irritating to skin. Has good rub-in and after-feel. Compatible with a broad spectrum of oils and emollients. HLB 10. |
| IUPAC Name | Hexadecyl dihydrogen phosphate |
| Molecular Weight | 322.42 g/mol |
| Molecular Formula | C16H35O4P |
| Canonical SMILES | CCCCCCCCCCCCCCCCOP(=O)(O)O |
| InChI | ZUVCYFMOHFTGDM-UHFFFAOYSA-N |
| InChI Key | InChI=1S/C16H35O4P/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-20-21(17,18)19/h2-16H2,1H3,(H2,17,18,19) |
| Boiling Point | 440.0±28.0 °C |
| Melting Point | 71 °C |
| Density | 1.013±0.06 g/mL |
| Solubility | Oil-soluble |
| Appearance | White to beige, practically odorless granules |
| Application | Creams, gels, lotions, suncare products. |
| Storage | Store light-protected at a cool and dry place |
| Features And Benefits | Mild and effective emulsifier and co-emulsifierEnhances the stability of emulsions and thickens creams and lotionsUsed often for making stable water-resistant sun-care formulations |
| HS Code | 3402130000 |
| INCI | Cetyl phosphate |
| Uses | Typical use between 0.2-2%. Add to oil phase of formulas. For external use only. |
Cetyl Phosphate, a hexadecyl dihydrogen phosphate ester, is an oil-soluble, waxy white flake with a melting point of 68°C and serves as a highly effective anionic oil-in-water emulsifier in its acid form. This property allows formulators to create tailor-made salts through partial neutralization with various bases, making the acid form oil-soluble while its neutralized salts become water-soluble. Typically used as a co-emulsifier with low HLB nonionics, Cetyl Phosphate provides non-irritating benefits and, even at low concentrations, enhances emulsion stability and increases the viscosity in creams and lotions. It effectively substitutes TEA-stearate in many formulations and performs optimally as a primary emulsifier at normal skin pH levels by promoting emulsion system stability. The inclusion of Cetyl Phosphate in formulations imparts improved shear, heat, and freeze-thaw stability while also enhancing the glossy appearance of cosmetic creams. Its application extends to oil-in-water creams and lotions containing diverse oils and emollients, proving particularly beneficial for stable, water-resistant sun-care products and various dermatological and personal care items. Moreover, Cetyl Phosphate supports PEG-free formulations by not containing ethoxylated parts.
What is Cetyl Phosphate and what are its physical characteristics?
Cetyl Phosphate is a hexadecyl dihydrogen phosphate ester. It is typically available as an oil-soluble, waxy white flake with a melting point of 68°C.
How does Cetyl Phosphate function in formulations?
Cetyl Phosphate serves as a highly effective anionic oil-in-water emulsifier. It is supplied in an acid form, which allows the creation of tailor-made salts via partial neutralization with various bases to suit specific formulation needs. While the acid form is oil-soluble, the neutralized salts become water-soluble.
Can Cetyl Phosphate be used as a primary emulsifier?
Yes, Cetyl Phosphate can be used as a primary emulsifier. It performs effectively at normal skin pH and is particularly useful at low-use concentrations to increase viscosity and stabilize the emulsion system. It also helps achieve enhanced shear, heat, and freeze-thaw stability in formulations.
What are the benefits of using Cetyl Phosphate in cosmetic formulations?
Cetyl Phosphate offers multiple benefits in cosmetic formulations, including enhancing the stability of emulsions, thickening creams and lotions, and providing a glossy appearance to cosmetic cremes. It is suitable for oil-in-water creams and lotions that incorporate a wide variety of oils and emollients. Additionally, it is especially effective in stable, water-resistant sun-care products and other dermatological and personal care items.
Is Cetyl Phosphate suitable for PEG-free formulations?
Yes, Cetyl Phosphate is suitable for PEG-free formulations as it does not contain ethoxylated parts, making it a favorable choice for creating formulations free from PEGs.
Does Cetyl Phosphate cause skin irritation?
Cetyl Phosphate is non-irritating to the skin, making it a safe choice for use in a variety of personal care and dermatological products.
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