What is Laureth-4 used for in cosmetics?

Laureth-4 is primarily used as an emulsifier to blend oil and water ingredients, and as a surfactant to help products cleanse and foam.

Is Laureth-4 safe for sensitive skin?

Individuals with sensitive skin may experience irritation from Laureth-4, so patch testing is recommended.

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Laureth-4

Laureth-4 is a synthetic polymer derived from lauryl alcohol and ethylene oxide. It functions primarily as an emulsifier, helping to mix oil and water-based ingredients in cosmetic formulations. It can also act as a surfactant, aiding in cleansing and foaming.

NoneEmulsifierEvidence: Medium

BenefitNone 0 / 4

RiskModerate 1.5 / 4

Irritation i1.5 / 4

Risk of short-term irritation — stinging, burning, dryness, redness, or discomfort. Common for strong actives, acids, retinoids, fragrances, and harsh surfactants.

Sensitization i1 / 4

Risk of allergic contact dermatitis or immune-based reactions. Fragrance allergens, preservatives, botanicals, and some dyes may score here.

Rated by SpottyLabs' ingredient methodology, independent of brands.

Things to watch

Can cause skin irritation in some individuals
May contribute to sensitization over time

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Products with Laureth-4

Diamond Sleek Shine-Coat Smoothing Spray

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Frequently asked questions

What is Laureth-4 used for in cosmetics?: Laureth-4 is primarily used as an emulsifier to blend oil and water ingredients, and as a surfactant to help products cleanse and foam.
Is Laureth-4 safe for sensitive skin?: Individuals with sensitive skin may experience irritation from Laureth-4, so patch testing is recommended.