Ingredient review

Beheneth-2

INCI: Beheneth-2

Beheneth-2 is a gentle emulsifier that helps creamy products stay smooth and stable, with a very low risk of irritation.

beautyskincareemulsifier

In plain English

Beheneth-2 is a helper ingredient that keeps oil and water mixed together in creams and lotions. It's made from behenyl alcohol (derived from natural oils) and a small amount of ethylene oxide, which makes it water-friendly. Because it's used in tiny amounts and is very mild, it rarely causes problems for most skin types.

Quick decision guide

Useful, but context matters

Beheneth-2 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-2.
  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-2 is a semi-synthetic emulsifier created by adding two ethylene oxide units to behenyl alcohol, a fatty alcohol derived from rapeseed or other plant oils. It belongs to the ethoxylated alcohol family and is valued for its ability to stabilize emulsions without being harsh.

How it works

Beheneth-2 has both a water-loving (hydrophilic) and oil-loving (lipophilic) end. When added to a formula, it positions itself at the boundary between oil and water droplets, reducing surface tension and preventing them from separating. This keeps the product smooth and consistent over time.

Pros

Gentle on skin

Beheneth-2 has a very low irritation risk, making it a safe choice for sensitive skin and daily-use products like moisturizers and cleansers.

Stable emulsions

It effectively prevents oil and water from separating, so your creams and lotions stay smooth and effective throughout their shelf life.

Cons and cautions

Ethoxylation concerns

The manufacturing process can create trace amounts of 1,4-dioxane, a potential carcinogen. However, reputable brands purify their ingredients to keep levels well below safety limits.

Not fully natural

Although derived from plant oils, Beheneth-2 is chemically modified, so it may not appeal to those seeking entirely natural or organic formulations.

Best for

  • People with normal to dry skin who use creamy moisturizers
  • Anyone looking for a stable, non-irritating emulsifier in their products

Use caution if

  • Those who strictly avoid any ethoxylated ingredients due to 1,4-dioxane concerns

Usage tips

Look for Beheneth-2 in the middle to end of the ingredient list, as it's used in small amounts.
If you prefer to minimize exposure to ethoxylated ingredients, choose products from brands that test for 1,4-dioxane purity.

Safety summary

Beheneth-2 is considered safe for cosmetic use with very low irritation and comedogenic risk. The main concern is trace 1,4-dioxane from ethoxylation, but modern purification methods keep levels within safe limits set by regulators.

Research notes

The Cosmetic Ingredient Review (CIR) panel reviewed ethoxylated alcohols including Beheneth-2 and concluded they are safe in rinse-off and leave-on products at typical concentrations. No significant human or animal toxicity data specific to Beheneth-2 is available, but its chemical class is well-studied.

Common label clues

Typical concentration
0.5% to 5%
Regulatory status
Approved for use in cosmetics in the US, EU, and many other regions. The Cosmetic Ingredient Review (CIR) panel has deemed it safe at concentrations up to 5%.
Common uses
Moisturizers, Hair conditioners, Cleansers, Sunscreens
Environmental note
Beheneth-2 is not readily biodegradable, but its low usage concentration means its environmental impact is minimal compared to other surfactants.

Good to know

  • Beheneth-2 is often paired with other emulsifiers like cetearyl alcohol for a richer texture.
  • It is considered safe by the Cosmetic Ingredient Review (CIR) panel at typical use levels.

Common questions

What is Beheneth-2 in beauty products?

Beheneth-2 is a helper ingredient that keeps oil and water mixed together in creams and lotions. It's made from behenyl alcohol (derived from natural oils) and a small amount of ethylene oxide, which makes it water-friendly. Because it's used in tiny amounts and is very mild, it rarely causes problems for most skin types.

What does Beheneth-2 do in a beauty product?

Beheneth-2 has both a water-loving (hydrophilic) and oil-loving (lipophilic) end. When added to a formula, it positions itself at the boundary between oil and water droplets, reducing surface tension and preventing them from separating. This keeps the product smooth and consistent over time.

Is Beheneth-2 safe for most people?

Beheneth-2 is considered safe for cosmetic use with very low irritation and comedogenic risk. The main concern is trace 1,4-dioxane from ethoxylation, but modern purification methods keep levels within safe limits set by regulators.

Who should be careful with Beheneth-2?

Those who strictly avoid any ethoxylated ingredients due to 1,4-dioxane concerns

Research sources

Cosmetic Ingredient Review (CIR) - Safety Assessment of Ethoxylated AlcoholsOpenPubChem - Beheneth-2 Compound SummaryOpenEuropean Chemicals Agency (ECHA) - Beheneth-2 InformationOpen

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.