What is an emulsifier?

An emulsifier is an ingredient that helps two immiscible liquids, like oil and water, mix together to form a stable emulsion, preventing them from separating.

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Ceteareth-33

Ceteareth-33 is a synthetic compound that functions as an emulsifier and surfactant in cosmetic products. As an emulsifier, it helps to mix oil and water-based ingredients, creating stable formulations. As a surfactant, it can aid in cleansing by reducing surface tension.

Emulsifier, surfactant

BenefitNone 0 / 4

RiskLow 1 / 4

Irritation i1 / 4

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

Sensitization i0.5 / 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 be irritating to sensitive skin
potential for sensitization

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Products with Ceteareth-33

L'Occitane en Provence

Karité Confort Ultra Rich Body Cream

4.2/ 511/9/2

L'Occitane en Provence

Shea Butter Hand Cream (Dry Hands)

3.5/ 59/7/16

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Frequently asked questions

What is an emulsifier?: An emulsifier is an ingredient that helps two immiscible liquids, like oil and water, mix together to form a stable emulsion, preventing them from separating.