STEAROYL ETHYLTRIMONIUM METHOSULFATE

Substance information

The name component "stearoyl" means that the ingredient contains, as fatty acid component, amongst others, stearic acid (octadecanoic acid) (mostly introduced via an acylation reaction). "Ethyl" refers mostly to ethanol (ethyl alcohol) as an alcoholic component or generally a hydrocarbon residue with 2 carbon atoms. "Trimonium..." refers to a quaternary trimethyl ammonium salt, often based on fatty amines. Examples: "steartrimonium..." contains a stearyl-(C18-) carbon chain; "laurtrimonium..." contains a lauryl-(C12-) hydrocarbon residue. Methosulfates are salts or esters of methylsulfuric acid.

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Function(s) of this ingredient in cosmetic products

SURFACTANT - EMULSIFYING

Allows the formation of finely dispersed mixtures of oil and water (emulsions)

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Background information on use in cosmetics

Emulsifiers are often used in cosmetics as excipients. They allow actually unmixable components like oil and water to be brought in a permanently stable emulsion. In this way both aqueous and oily care and active ingredients can be used in one and the same product in cosmetics. Emulsifiers are able to do that since their molecules consist of a lipophilic and a hydrophilic part. In this way they can reduce the interfacial tension which actually exists between two incompatible substances like fat and water. Emulsifiers are, more particularly, used for creams, lotions and cleansing agents. At present emulsifiers are, however, more than only excipients which keep an emulsion stable. Fatty acid esters on the basis of sugar, lecithin or glycerin monodistearate contribute, for instance, to improving the moisture balance of the skin and are, therefore, also considered as cosmetic active ingredients.

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Belongs to the following substance groups

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Regulating cosmetics

Cosmetics Ingredients are subject to regulation. Please note, different regulations may apply to cosmetic ingredients outside the EU.