Steareth-21 is a synthetic ingredient derived from stearyl alcohol. It functions as a surfactant, emulsifier, and solubilizing agent in skincare products. It helps keep ingredients together in an emulsion and is considered safe for use in cosmetics by the Cosmetic Ingredient Review (CIR) panel. However, concerns have been raised regarding the potential contamination of Steareth-21 with 1,4-dioxane, a known toxin.
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Steareth-21 may cause skin, eye, or lung irritation. It may also be contaminated with ethylene oxide and 1,4-dioxane, which are potential carcinogens.
Steareth-21 should be used in low concentrations and should not be used on damaged skin.
Steareth-21 is a synthetic ingredient derived from stearyl alcohol.
Safe for use in cosmetics in amounts up to 7%
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Steareth-21 is often combined with other steareth ingredients, such as steareth-2, for an improved sensory profile. The number that comes after (for instance, 21) indicates the average number of ethylene oxide units used in the preparation.
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