Ingredient review

Beheneth-10

INCI: Beheneth-10

Beheneth-10 is a gentle, synthetic emulsifier that helps mix oil and water in products, making it a safe choice for most skin types, including sensitive skin.

beautyskincaresurfactantemulsifier

In plain English

Beheneth-10 is a man-made ingredient that helps oil and water blend together in your skincare and haircare products. It's a type of surfactant (a mild cleansing agent) that can also help thicken or stabilize a formula. Because it's derived from behenyl alcohol (a fatty alcohol from plants), it's considered very gentle and non-irritating, making it a common choice for sensitive skin cleansers and moisturizers.

Quick decision guide

Useful, but context matters

Beheneth-10 is generally a lower-concern ingredient when the full formula suits your skin.

Plain-English read

Treat this as a practical screening step before you compare products that contain this ingredient.

Step 1Start with the score, then check the irritation and clogging risk before judging Beheneth-10.
Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.

Score terms in plain English

Irritation risk

low

Less likely to sting, burn, or bother most users, though sensitive skin can still react.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

moderate

There is useful support, but formula details and claim strength still matter.

What it is

Beheneth-10 is a synthetic, non-ionic surfactant and emulsifier created by adding 10 units of ethylene oxide to behenyl alcohol (a fatty alcohol derived from rapeseed or other plant oils). It belongs to the ethoxylated fatty alcohol family and is known for its mildness and compatibility with other ingredients.

How it works

In a cosmetic product, Beheneth-10 sits at the interface between oil and water, reducing surface tension so the two can mix into a stable emulsion. This helps create smooth, creamy textures in lotions and cleansers. As a surfactant, it also helps lift dirt and oil from the skin or hair, allowing them to be rinsed away without stripping the natural moisture barrier.

Pros

Very gentle on skin

Beheneth-10 is one of the mildest surfactants, making it ideal for sensitive or reactive skin types that react to stronger cleansers like sodium lauryl sulfate.

Improves product feel

As an emulsifier, it helps create smooth, luxurious textures in creams and lotions, making them easier to apply and more pleasant to use.

Cons and cautions

Synthetic production

Beheneth-10 is made through a chemical process (ethoxylation), which may be a concern for those seeking naturally derived or minimally processed ingredients.

Potential trace impurities

The ethoxylation process can produce trace amounts of 1,4-dioxane, a potential contaminant. However, reputable manufacturers purify the ingredient to safe levels.

Best for

People with dry or sensitive skin looking for a gentle cleanser
Anyone who prefers mild, non-stripping surfactants in their daily routine

Use caution if

Those who strictly avoid synthetic or ethoxylated ingredients

Usage tips

Look for Beheneth-10 in gentle, sulfate-free cleansers if you have dry or sensitive skin.

It's often combined with other mild surfactants to boost cleansing power without irritation.

In leave-on products, it helps stabilize emulsions—check the ingredient list if you love a creamy moisturizer.

Safety summary

Beheneth-10 is considered safe for use in cosmetics at typical concentrations. It has low irritation and sensitization potential. The main safety consideration is the potential for trace 1,4-dioxane from the ethoxylation process, but reputable suppliers purify the ingredient to meet safety standards set by regulators like the FDA and EU CosIng.

Research notes

Research on Beheneth-10 specifically is limited, but it belongs to a well-studied class of ethoxylated fatty alcohols. The Cosmetic Ingredient Review (CIR) has reviewed similar ingredients and found them safe for cosmetic use. Studies show that these surfactants are mild and non-irritating compared to harsher alternatives like SLS.

Common label clues

Typical concentration: Usually 0.5% to 5% in rinse-off products; lower in leave-on formulas
Regulatory status: Approved for use in cosmetics in the US, EU, and many other regions. The Cosmetic Ingredient Review (CIR) has assessed related ethoxylated fatty alcohols and deemed them safe at typical concentrations.
Common uses: Cleansers, Shampoos, Conditioners, Lotions, Creams
Environmental note: Beheneth-10 is biodegradable and not considered a significant environmental concern at the low concentrations used in personal care products.

Good to know

Beheneth-10 is part of the 'beheneth' family, where the number indicates the ethylene oxide units (e.g., Beheneth-5, Beheneth-20).
It is considered biodegradable and safe for aquatic environments at typical use levels.
The Cosmetic Ingredient Review (CIR) panel has reviewed similar ethoxylated alcohols and found them safe as used in cosmetics.

Common questions

What is Beheneth-10 in beauty products?

What does Beheneth-10 do in a beauty product?

Is Beheneth-10 safe for most people?

Who should be careful with Beheneth-10?

Those who strictly avoid synthetic or ethoxylated ingredients

Research sources

Cosmetic Ingredient Review (CIR) - Safety Assessment of Ethoxylated Fatty AlcoholsOpen EU CosIng Database - Beheneth-10Open PubChem - Beheneth-10Open

Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.