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Researched by Helena DeMaria-Williams

Formula IngredientEmulsifier, Surfactant

Laureth-12

INCI: Laureth-12

Laureth-12 is a polyethylene glycol ether of lauryl alcohol (dodecanol), produced by ethoxylating lauryl alcohol with 12 units of ethylene oxide. It functions as both an emulsifier — helping oil and water phases blend stably in a formulation — and a mild surfactant/cleansing agent that helps break down and remove oils, dirt, and impurities from skin and hair. It is widely used in leave-on and rinse-off cosmetic products including primers, serums, cleansers, and hair colour treatments.

Category

Emulsifier, Surfactant

Irritation Risk

Low

Skin Types

all skin types, oily, combination, dry, sensitive

What does this do in a formula?

emulsification, texture stabilisation, mild cleansing, solubilising oil-based actives

Is Laureth-12 safe? Key considerations

Can Laureth-12 cause irritation?

Low Risk

Laureth-12 is generally considered mild and well-tolerated at typical cosmetic concentrations. As a member of the laureth ethoxylate family it may cause mild irritation in very sensitive or compromised skin barriers, though clinical irritation at cosmetic use levels is uncommon. No EU CosIng Annex II (banned) or Annex III (restricted) designations apply. Individuals with known sensitivity to polyethylene glycol (PEG) derivatives should patch test.

Does Laureth-12 increase sun sensitivity?

No Risk

Laureth-12 is not a photosensitising ingredient. No sun protection precautions are required based on its presence in a formulation.

Is Laureth-12 safe during pregnancy?

MANUAL REVIEW: Limited specific pregnancy safety data available. As a surfactant/emulsifier with low systemic absorption at cosmetic concentrations, it is generally regarded as low risk, but no dedicated MotherToBaby or clinical pregnancy safety assessment was accessible from available sources.

No specific pregnancy safety data was found via EWG Skin Deep or MotherToBaby for this ingredient. Based on its function as a mild surfactant/emulsifier and its widespread use in rinse-off and leave-on cosmetics, topical exposure at typical concentrations is expected to carry low risk. Consult a healthcare provider if concerned.

How does Laureth-12 work?

Laureth-12 is a polyethylene glycol ether of lauryl alcohol (dodecanol), produced by ethoxylating lauryl alcohol with 12 units of ethylene oxide. It functions as both an emulsifier — helping oil and water phases blend stably in a formulation — and a mild surfactant/cleansing agent that helps break down and remove oils, dirt, and impurities from skin and hair. It is widely used in leave-on and rinse-off cosmetic products including primers, serums, cleansers, and hair colour treatments.

Individuals with known sensitivity to PEG (polyethylene glycol) derivatives should review the considerations above before use.

Which products contain Laureth-12?

Shop products that contain Laureth-12