Ingredient review

Sodium Oleoamphoacetate

INCI: Sodium Oleoamphoacetate

A gentle, amphoteric surfactant that cleanses effectively while being kind to sensitive skin.

beautyskincarecleanser

In plain English

Sodium Oleoamphoacetate is a mild cleansing ingredient made from oleic acid (a fatty acid found in olive oil and other plant oils). It belongs to a class of surfactants called amphoacetates, which are known for being very gentle on the skin. Unlike harsh soaps that can strip away natural oils, this ingredient cleanses without leaving your skin feeling tight or dry. You'll often find it in products labeled 'gentle' or 'for sensitive skin,' including baby shampoos and facial cleansers.

Review score

Safety, usefulness, and evidence

4.0Good

4.0/ 5

Potentially useful with some tradeoffs

The evidence base is useful, but some claims depend heavily on the formula.

Risk flags are low for most users, though the finished product can still irritate.

Source: semi synthetic
Evidence: moderate
Irritation: low
Clogging risk: low

How reviews are scored

Quick decision guide

Useful, but context matters

Sodium Oleoamphoacetate 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 Sodium Oleoamphoacetate.
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

Sodium Oleoamphoacetate is an amphoteric surfactant derived from oleic acid, a monounsaturated fatty acid commonly sourced from olive oil. It is produced by reacting oleic acid with amino compounds to create a molecule that can attract both water and oil, making it effective at lifting dirt and sebum.

How it works

In a cosmetic product, Sodium Oleoamphoacetate works by reducing the surface tension between water and oil, allowing the product to break down and rinse away sebum, makeup, and environmental debris. Because it is amphoteric (it can act as either an acid or a base depending on the pH), it remains mild and non-irritating across a wide pH range, making it suitable for formulations that need to be gentle on the skin barrier.

Pros

Exceptionally gentle on skin

Unlike sodium lauryl sulfate, this surfactant cleanses without disrupting the skin barrier, reducing the risk of irritation and dryness.

Works well in sulfate-free formulas

It pairs nicely with other mild surfactants to create a rich, creamy lather that feels luxurious while staying kind to sensitive skin.

Cons and cautions

Less effective on heavy makeup

If you wear long-wear or waterproof makeup, you may need a double-cleansing routine because this ingredient alone may not dissolve stubborn products.

Higher cost in formulations

Products containing this ingredient are often priced higher due to the more complex manufacturing process compared to basic sulfates.

Best for

People with dry or sensitive skin looking for a non-stripping cleanser
Anyone who prefers sulfate-free or gentle cleansing formulas

Use caution if

Those who need a very strong cleanser for heavy oil or waterproof makeup removal

Usage tips

Use a gentle cleanser containing this ingredient as your second step in a double-cleansing routine for best results.

Look for products that list it early in the ingredient list to ensure it's a primary cleanser.

Safety summary

Sodium Oleoamphoacetate is widely regarded as safe for use in cosmetics. It has a low irritation and sensitization potential, and is commonly used in products for sensitive skin and babies. No significant safety concerns have been raised by regulatory bodies.

Research notes

Research on amphoteric surfactants like Sodium Oleoamphoacetate shows they are significantly milder than anionic surfactants (e.g., SLS) and help preserve skin barrier function. While specific studies on this exact ingredient are limited, the broader class of amphoacetates is well-documented for gentleness.

Common label clues

Typical concentration: 5–15% in rinse-off cleansers
Regulatory status: Approved for use in cosmetics in the EU, US, and other major markets. It is not restricted by the FDA or the European Commission.
Common uses: Facial cleansers, Body washes, Shampoos, Baby care products
Environmental note: Derived from renewable plant sources (oleic acid from olive oil) and generally considered biodegradable, making it a more eco-friendly choice compared to petroleum-based surfactants.

Good to know

Sodium Oleoamphoacetate is often used alongside other mild surfactants like cocamidopropyl betaine to improve foam quality.
It is considered biodegradable and more environmentally friendly than some traditional surfactants.

Common questions

What is Sodium Oleoamphoacetate in beauty products?

What does Sodium Oleoamphoacetate do in a beauty product?

Is Sodium Oleoamphoacetate safe for most people?

Who should be careful with Sodium Oleoamphoacetate?

Those who need a very strong cleanser for heavy oil or waterproof makeup removal

Research sources

Cosmetic Ingredient Review (CIR) – Safety Assessment of AmphoacetatesOpen PubChem – Sodium OleoamphoacetateOpen European Commission CosIng DatabaseOpen

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.