Steareth-21

Steareth-21. Cleansing

Steareth-21 is a nonionic emulsifier made by reacting stearyl alcohol with 21 units of ethylene oxide. It is mainly a cleansing agent and emulsifier.

The "21" in the name just tells you it has a longer water-loving chain. This makes it more gentle and less likely to irritate skin compared to lower-numbered steareths.

You'll most likely see it paired with steareth-2 because the two work together to create stable formulations.

1,4-dioxane is often brought up as a concern but this is usually removed through purification.

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