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Sorbitan Sesquioleate

What Sorbitan Sesquioleate is & what it does

A co-emulsifier used to stabilize water-in-oil systems and disperse pigments evenly. It helps build smooth, stable creams.

What is Sorbitan Sesquioleate and what does it do in sunscreen?

Sorbitan Sesquioleate is a co-emulsifier. In sunscreen it helps stabilize water-in-oil systems and disperse pigments and filters evenly, which keeps the cream smooth and consistent. It works alongside other emulsifiers to build a stable texture.

Is Sorbitan Sesquioleate safe?

Yes. Sorbitan esters are a long-established and well-tolerated class of cosmetic emulsifiers, used at low levels to hold formulas together. Sorbitan Sesquioleate is not flagged as an allergen in our data and is considered gentle for most people. It does its job of stabilizing the emulsion and is not a common source of irritation.

Does Sorbitan Sesquioleate clog pores?

Generally no. It is used in small amounts as an emulsifier rather than as a rich oil or wax, so it is an unlikely pore-clogging culprit. If a product breaks you out, the heavier emollients and oils elsewhere in the formula are far more likely responsible.

Is Sorbitan Sesquioleate fungal-acne safe?

If you are actively managing fungal acne, you may want to avoid it. It is a sorbitan ester carrying a fatty (oleic) tail, and the malassezia yeast behind fungal acne can use that fatty part, so the sorbitan and polysorbate family is often left out of fungal-acne-safe routines. For everyone else it is harmless. This is one specific skin concern, not a broad safety question.

What is Sorbitan Sesquioleate on an ingredient list (INCI)?

"Sorbitan Sesquioleate" is the INCI name printed on the label. It is an ester of sorbitol (a sugar alcohol) and oleic acid, and it usually appears low on the list among the emulsifiers that hold the formula together rather than near the actives.

Sunscreens with Sorbitan Sesquioleate

We rate 276 sunscreens that contain it, showing the top 10 by overall score:

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