Steareth-20

Steareth-20 is a synthetic polymer that functions primarily as an emulsifier and surfactant in cosmetic formulations. It helps to blend oil and water-based ingredients, creating stable and uniform product textures. It can also act as a cleansing agent, helping to remove dirt and oil from the skin or hair.

BenefitNone 0 / 4

RiskLow 1 / 4

Eye irritation i1 / 4

Whether it may sting or irritate around the eyes. Relevant for sunscreens, fragrances, acids, surfactants, and volatile ingredients.

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.

Barrier disruption i0.5 / 4

Whether it can weaken or damage the skin barrier — harsh surfactants, strong exfoliants, high alcohol content, or overuse-prone actives.

Systemic exposure i0.5 / 4

Whether it has meaningful potential to be absorbed into the body at levels that may matter biologically. Most cosmetic ingredients score low unless there is known concern or high exposure.

Rated by SpottyLabs' ingredient methodology, independent of brands.

Things to watch

• Potential for mild skin irritation

Products with Steareth-20

Browse all products →

Frequently asked questions

What is the purpose of Steareth-20 in cosmetics?

Steareth-20 is used as an emulsifier to help oil and water mix, creating stable product formulations. It also functions as a surfactant, which means it can help cleanse by reducing surface tension and aiding in the removal of dirt and oils.