Ingredient review

Disodium Stearoamphodiacetate

INCI: Disodium Stearoamphodiacetate

A gentle, non-stripping cleanser that helps maintain skin's moisture barrier while effectively removing dirt and oil.

beautyskincaresurfactant

In plain English

Disodium Stearoamphodiacetate is a mild cleansing ingredient that works like a gentle soap. It helps lift dirt and oil from your skin and hair without leaving them feeling dry or tight. Because it's so gentle, it's often used in baby shampoos and sensitive-skin cleansers. It also has conditioning properties, meaning it can leave skin feeling soft and hair more manageable.

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

Disodium Stearoamphodiacetate 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 Disodium Stearoamphodiacetate.
  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

Disodium Stearoamphodiacetate is a semi-synthetic surfactant (cleansing agent) made from stearic acid, a fatty acid found naturally in shea butter and cocoa butter. It belongs to the amphoacetate family, known for being exceptionally mild on skin and eyes.

How it works

As a surfactant, it reduces the surface tension between water and oil, allowing water to mix with and rinse away sebum, dirt, and makeup. Its amphoteric nature (it carries both positive and negative charges) makes it gentle because it doesn't strip the skin's natural moisture barrier the way harsher sulfates can. It also leaves a light conditioning film on skin and hair, reducing friction and improving feel.

Pros

Ultra-gentle on skin

Disodium Stearoamphodiacetate is one of the mildest surfactants available, making it ideal for sensitive skin, rosacea, and baby care. It cleans without causing tightness or irritation.

Conditioning benefits

Unlike many cleansers that can leave hair and skin feeling dry, this ingredient deposits a light conditioning film that helps maintain softness and manageability.

Cons and cautions

Low foam profile

If you enjoy a rich, bubbly lather, this ingredient may feel less satisfying. It produces a creamy, low foam that some users perceive as less effective, even though it cleans well.

Limited standalone cleansing power

For removing heavy, waterproof makeup or long-wear sunscreen, this ingredient often needs to be paired with other, stronger cleansers or oils to be fully effective.

Best for

  • People with dry, sensitive, or eczema-prone skin
  • Those looking for a gentle, everyday facial or body cleanser
  • Parents seeking mild baby washes and shampoos

Use caution if

  • Anyone specifically wanting a high-foam, bubbly cleanser (this ingredient produces a low, creamy lather)

Usage tips

Use as part of a double-cleansing routine: start with an oil cleanser, then follow with a product containing this gentle surfactant.
Look for it in sulfate-free shampoos and body washes if you have color-treated hair or dry skin.
If you prefer more foam, choose a formula that blends this ingredient with other mild surfactants like cocamidopropyl betaine.

Safety summary

Disodium Stearoamphodiacetate has a strong safety profile. It is non-irritating to skin and eyes at typical use levels, and is not known to be sensitizing. The Cosmetic Ingredient Review (CIR) panel has reviewed similar amphoacetates and found them safe as used in cosmetics.

Research notes

While not as extensively studied as some common surfactants, the amphoacetate family has been evaluated by the Cosmetic Ingredient Review and found safe. Studies show these ingredients have low acute toxicity and are not skin sensitizers. Their mildness is well-documented in dermatological literature.

Common label clues

Typical concentration
1–10% in rinse-off products; lower in leave-on formulas
Regulatory status
Approved for use in cosmetics by the FDA and the European Commission. It is considered safe at typical concentrations used in rinse-off and leave-on products.
Common uses
Facial cleansers, Body washes, Shampoos, Conditioners, Baby care products
Environmental note
This ingredient is derived from plant-based stearic acid and is generally biodegradable, making it a more eco-friendly choice compared to some petroleum-based surfactants.

Good to know

  • Disodium Stearoamphodiacetate is often listed near the middle or end of an ingredient list because it's used at lower concentrations.
  • It is considered biodegradable and generally environmentally friendly compared to some harsher surfactants.

Common questions

What is Disodium Stearoamphodiacetate in beauty products?

Disodium Stearoamphodiacetate is a mild cleansing ingredient that works like a gentle soap. It helps lift dirt and oil from your skin and hair without leaving them feeling dry or tight. Because it's so gentle, it's often used in baby shampoos and sensitive-skin cleansers. It also has conditioning properties, meaning it can leave skin feeling soft and hair more manageable.

What does Disodium Stearoamphodiacetate do in a beauty product?

As a surfactant, it reduces the surface tension between water and oil, allowing water to mix with and rinse away sebum, dirt, and makeup. Its amphoteric nature (it carries both positive and negative charges) makes it gentle because it doesn't strip the skin's natural moisture barrier the way harsher sulfates can. It also leaves a light conditioning film on skin and hair, reducing friction and improving feel.

Is Disodium Stearoamphodiacetate safe for most people?

Disodium Stearoamphodiacetate has a strong safety profile. It is non-irritating to skin and eyes at typical use levels, and is not known to be sensitizing. The Cosmetic Ingredient Review (CIR) panel has reviewed similar amphoacetates and found them safe as used in cosmetics.

Who should be careful with Disodium Stearoamphodiacetate?

Anyone specifically wanting a high-foam, bubbly cleanser (this ingredient produces a low, creamy lather)

Research sources

Cosmetic Ingredient Review – Safety Assessment of AmphoacetatesOpenPubChem – Disodium StearoamphodiacetateOpenEWG Skin Deep – Disodium StearoamphodiacetateOpen

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.