Carbon Chain Length: The \"ID Card\" of Fatty Alcohols
The physicochemical properties of fatty alcohols are closely tied to chain length: the longer the chain, the higher the melting point, the lower the water solubility and the lower the molecular polarity. C12 alcohol (lauryl alcohol) is a white flaky solid at room temperature with a melting point around 24°C, while C16 alcohol (cetyl alcohol) melts around 49°C with a harder, waxier texture. This difference directly determines their division of roles in downstream formulations.
C12: The Workhorse of the Surfactant Industry
C12 alcohol is the most widely used feedstock for SLES, APG and primary amines, with large demand and good availability. If your products are mass-market home care items such as detergents, shampoos and body washes, C12 alcohol is usually the most cost-effective choice.
C16: The Texture Expert in Personal Care
C16 alcohol (together with C18 stearyl alcohol) is more commonly used in cosmetic emulsion systems as a consistency modifier and emulsion stabilizer, giving creams a rich, cushioned skin feel. It is widely used in face creams, lotions, hair conditioners and sunscreens. The two are often used as C16-18 blends to balance spreadability and stability.
Selection Tips
- For surfactants/detergents: choose C12 alcohol or C12-14 blends
- For cosmetic creams/hair conditioning: choose C16, C18 or C16-18 blends
- To balance cost and performance: consider combining C12-14 and C16-18 blends
Closing Remarks
Shanghai Tuyi supplies the full C6-C22 fatty alcohol range and various blends, complete specifications and customizable specs. For selection support or samples, submit an RFQ online.