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stearyl alcohol be a substitute for cetyl alcohol?
HELLO ALL
Could the stearyl alcohol be a substitute for cetyl alcohol? -
12 Replies
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Yes, absolutely
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It depends on the application. Sometimes you can but sometimes you can’t. What do you want to substitute it in?
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Stearyl alcohol is much more draggy than cetyl alcohol. They have similar functions but product will be different upon application. Same is true about behenyl alcohol (more draggy and dryer than cetyl).
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Cetostearyl alcohol (70:30 mixture of cetyl and stearyl alcohols) is a coemulsifier, it helps make emulsions more stable, while neither cetyl or stearyl alcohols do that on their own.
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@Gunther: Do you have any evidence for that claim?
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Perry said:It depends on the application. Sometimes you can but sometimes you can’t. What do you want to substitute it in?
THAKS PERRY
make conditioner hair -
It will work, but stearic acid, stearyl alcohol and cetearyl alcohol (30:70) are rather draggy on hair. Cetyl would be a better option.
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ngarayeva001 said:It will work, but stearic acid, stearyl alcohol and cetearyl alcohol (30:70) are rather draggy on hair. Cetyl would be a better option.
thanks ely iam happy
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Pharma said:@Gunther: Do you have any evidence for that claim?
Effect of cetostearyl alcohol on stabilization of oil-in-water emulsion: I. Difference in the effect by mixing cetyl alcohol with stearyl alcohol
AbstractIt is known that an oil-in-water emulsion increases in consistency and stability on addition of cetostearyl alcohol. When either cetyl alcohol or stearyl alcohol was added individually, the emulsion stability decreased. On storage at room temperature, unstable emulsions decreased in consistency and many particles (not visible immediately after preparation) appeared. The particles were determined to be crystals of the alcohol added. When both alcohols were included in the formulation simultaneously in the appropriate ratio, the emulsions were stable and did not show such changes. This difference in stability can be explained in relation to polymorphism of the alcohols.https://www.sciencedirect.com/science/article/pii/0021979776901934
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@Gunther Thanks. Though that’s a Japanese publication which is slightly older than I am. I doubt that the observed effect is ubiquitous and depends on oil phase composition but it would explain why cetylstearyl alcohol is more often used than the individual alcohols.
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It’s my personal preference but I avoid both stearyl and cetearyl in lotions for face. I don’t think it’s elegant enough. I either use cetyl only or a combination of cetyl and behenyl (3:1). Regarding stability, it is highly dependent on what else is in the formula. If you have a reliable conventional emulsifier, add polymeric emulsifiers (sepinov emt 10, pemulen ez4u, etc.) and carbomers, plus no weird ingredients and reasonable amount of oils, it should be ok.
I will for sure use cetearyl in an emulsified scrub or a product where application doesn’t matter. -
We use both at once in clenser
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