Ingredient review

Beheneth-25

INCI: BEHENETH-25

Beheneth-25 is a gentle, non-irritating emulsifier that helps cleanse without stripping the skin, making it a solid choice for sensitive skin formulas.

beautyskincaresurfactant

In plain English

Beheneth-25 is a mild cleansing ingredient that helps water and oil mix together in products like face washes and shampoos. It's known for being gentle on the skin and not causing irritation or clogging pores, which is why it's often used in formulas for sensitive or dry skin.

Quick decision guide

Useful, but context matters

Beheneth-25 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.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging Beheneth-25.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. 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-25 is a semi-synthetic surfactant and emulsifier made by adding 25 ethylene oxide units to behenyl alcohol (a fatty alcohol from plants). It helps stabilize mixtures of oil and water and provides gentle cleansing.

How it works

In a cosmetic product, Beheneth-25 works by reducing the surface tension between oil and water, allowing them to blend into a stable emulsion. It also helps lift dirt and excess oil from the skin or hair, which then rinses away easily with water.

Pros

Very gentle on skin

Beheneth-25 has a low irritation profile, making it a good choice for daily cleansers and products for sensitive skin.

Non-comedogenic

It does not clog pores, so it's safe for acne-prone skin when used in rinse-off products.

Cons and cautions

Semi-synthetic origin

Because it's made through ethoxylation, some consumers prefer to avoid it in favor of fully natural alternatives.

Limited leave-on use

It's primarily used in rinse-off products; high concentrations in leave-on formulas may feel slightly drying over time.

Best for

  • People with sensitive or reactive skin looking for a mild cleanser
  • Those who prefer low-irritation, non-stripping cleansing ingredients

Use caution if

  • Individuals with known allergies to ethoxylated ingredients (rare)
  • Those seeking 100% natural or plant-derived-only ingredients

Usage tips

Use in rinse-off cleansers for best results; avoid high concentrations in leave-on creams.
Pair with moisturizing ingredients like glycerin or ceramides to maintain skin hydration.

Safety summary

Beheneth-25 is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, though individuals with very sensitive skin should patch-test new products.

Research notes

Research on ethoxylated alcohols like Beheneth-25 indicates they are mild surfactants with low acute toxicity. The CIR panel has reviewed similar ingredients and found them safe for cosmetic use. No significant human or animal studies specifically on Beheneth-25 are widely cited.

Common label clues

Typical concentration
0.5–5% in rinse-off products; lower in leave-on formulas
Regulatory status
Approved for use in cosmetics in the EU, US, and other major markets. The Cosmetic Ingredient Review (CIR) panel has reviewed ethoxylated alcohols and found them safe at typical use levels.
Common uses
Cleansers, Shampoos, Body washes, Emulsions
Environmental note
As a semi-synthetic ingredient, its biodegradability is moderate. Some ethoxylated compounds can persist in the environment, but Beheneth-25 is generally considered low-risk.

Good to know

  • Beheneth-25 is often found in sulfate-free cleansers as a milder alternative to sodium lauryl sulfate.
  • It is considered safe by major cosmetic safety panels when used as directed.

Common questions

What is Beheneth-25 in beauty products?

Beheneth-25 is a mild cleansing ingredient that helps water and oil mix together in products like face washes and shampoos. It's known for being gentle on the skin and not causing irritation or clogging pores, which is why it's often used in formulas for sensitive or dry skin.

What does Beheneth-25 do in a beauty product?

In a cosmetic product, Beheneth-25 works by reducing the surface tension between oil and water, allowing them to blend into a stable emulsion. It also helps lift dirt and excess oil from the skin or hair, which then rinses away easily with water.

Is Beheneth-25 safe for most people?

Beheneth-25 is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, though individuals with very sensitive skin should patch-test new products.

Who should be careful with Beheneth-25?

Individuals with known allergies to ethoxylated ingredients (rare) Those seeking 100% natural or plant-derived-only ingredients

Research sources

Cosmetic Ingredient Review (CIR) – Safety of Ethoxylated AlcoholsOpenPubChem – Beheneth-25 Compound SummaryOpenEWG Skin Deep – Beheneth-25Open

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.