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Description
Cetostearyl Alcohol, also known as Cetearyl Alcohol, is a mixture of the long-chain saturated fatty alcohols cetyl alcohol (hexadecan-1-ol) and stearyl alcohol (octadecan-1-ol). The terms Cetostearyl Alcohol and Cetearyl Alcohol are chemically synonymous and are used interchangeably in pharmaceutical, cosmetic, and industrial formulations. This multifunctional ingredient serves as an emollient, consistency regulator, viscosity enhancer, co-emulsifier, and stabilizing wax in numerous topical products.
Unlike volatile alcohols such as ethanol or isopropanol, Cetostearyl Alcohol is a waxy solid with excellent moisturizing and skin-conditioning properties. It contributes to the formation of stable oil-in-water (O/W) and water-in-oil (W/O) emulsions, improves the rheological behavior of creams and lotions, enhances spreadability, and provides a rich, luxurious skin feel.
Due to its exceptional compatibility with emulsifiers, oils, silicones, and pharmaceutical excipients, Cetostearyl Alcohol is considered one of the most important structural lipids in cosmetic science and topical pharmaceutical formulation.
CAS Number
CAS Number: 67762-27-0
Synonyms
Physical Properties
Cetostearyl Alcohol is supplied as white flakes, pellets, beads, or waxy granules with little or no characteristic odor. It melts easily during formulation and contributes significantly to product consistency and stability.
Typical characteristics include:
The exact melting behavior depends upon the ratio of cetyl alcohol to stearyl alcohol.
Chemical Properties
Cetostearyl Alcohol consists of saturated primary fatty alcohol molecules that possess excellent chemical stability and oxidation resistance. The hydroxyl group provides limited hydrophilic interaction, while the long hydrocarbon chains contribute excellent emollient characteristics.
Important chemical characteristics include:
Its saturated molecular structure contributes to excellent shelf stability and resistance to rancidity.
Manufacturing Process
Commercial Cetostearyl Alcohol is manufactured through hydrogenation of natural fatty acids or fatty acid methyl esters obtained from vegetable oils such as palm or coconut oil.
Typical manufacturing stages include:
Different commercial grades contain varying cetyl-to-stearyl ratios depending on the intended application.
Mechanism of Action
Cetostearyl Alcohol functions by organizing into lamellar lipid structures within emulsions. These structures surround dispersed oil droplets, increasing viscosity and preventing coalescence.
Its primary mechanisms include:
In hair care formulations, it coats the hair fiber, reducing friction and improving softness and combability.
Applications
Cetostearyl Alcohol is widely utilized in numerous industries.
Cosmetic Industry
Hair Care
Pharmaceutical Industry
Personal Care
Advantages
Cetostearyl Alcohol provides numerous formulation benefits.
