Ingredient review
Diammonium Oleamido PEG-2 Sulfosuccinate
INCI: DIAMMONIUM OLEAMIDO PEG-2 SULFOSUCCINATE
A gentle, sulfate-free surfactant that cleanses effectively while being kind to sensitive and dry skin types.
In plain English
This ingredient is a mild soap-like molecule that helps water mix with oil and dirt so they can be rinsed away. It's made by combining oleic acid (a fatty acid from oils like olive or sunflower) with a modified form of sulfosuccinic acid, then adding ammonia to make it water-soluble. Unlike harsher cleansers such as sodium lauryl sulfate, it's designed to clean without stripping your skin's natural moisture barrier, making it a popular choice for gentle or baby-friendly formulas.
Review score
Safety, usefulness, and evidence
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
Quick decision guide
Useful, but context matters
Diammonium Oleamido PEG-2 Sulfosuccinate 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 Diammonium Oleamido PEG-2 Sulfosuccinate.
- 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
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A semi-synthetic surfactant created by reacting oleic acid (a fatty acid from plant oils) with polyethylene glycol (PEG) and sulfosuccinate, then neutralizing with ammonia. It belongs to the sulfosuccinate family, known for mild cleansing.
How it works
In a product, it reduces the surface tension between water and oil, allowing dirt, sebum, and makeup to be lifted from the skin and rinsed away. Its large molecular structure makes it less penetrating and less irritating than smaller surfactants.
Pros
Very gentle on skin
Its large molecular structure and mild chemistry make it one of the least irritating surfactants, ideal for daily use on sensitive or compromised skin.
Sulfate-free alternative
Provides effective cleansing without sodium lauryl sulfate or sodium laureth sulfate, reducing the risk of dryness and irritation.
Cons and cautions
Not as foamy as sulfates
Produces a lower, creamier lather that some users may perceive as less effective, though it still cleans well.
PEG-related concerns
Contains PEG-2, which can be contaminated with ethylene oxide during manufacturing, though reputable brands ensure purity.
Best for
- People with dry or sensitive skin
- Those seeking sulfate-free cleansers
- Parents looking for gentle baby washes
Use caution if
- Individuals with known allergies to oleic acid or PEG derivatives (rare)
Usage tips
Safety summary
Diammonium Oleamido PEG-2 Sulfosuccinate is considered safe for cosmetic use at typical concentrations. It has low irritation and comedogenic potential, making it suitable for sensitive skin. As with all PEG-containing ingredients, purity standards matter to avoid contaminants.
Research notes
Sulfosuccinates are well-studied as mild surfactants. Research shows they cause significantly less skin barrier disruption compared to sodium lauryl sulfate. Specific studies on this exact compound are limited, but the broader class is supported by safety reviews.
Common label clues
- Typical concentration
- 1–10% in rinse-off products
- Regulatory status
- Approved for use in cosmetics in the EU, US, and other major markets. The Cosmetic Ingredient Review (CIR) panel has deemed sulfosuccinates safe as used.
- Common uses
- Facial cleansers, Body washes, Shampoos, Baby care products
- Environmental note
- Sulfosuccinates are generally considered biodegradable, but the PEG component may persist longer in aquatic environments. Look for brands committed to eco-friendly sourcing.
Good to know
- This ingredient is often listed near the middle or end of an INCI list, indicating moderate concentration.
- It is compatible with a wide pH range (5.5–7.0), making it easy to formulate gentle cleansers.
Common questions
What is Diammonium Oleamido PEG-2 Sulfosuccinate in beauty products?
This ingredient is a mild soap-like molecule that helps water mix with oil and dirt so they can be rinsed away. It's made by combining oleic acid (a fatty acid from oils like olive or sunflower) with a modified form of sulfosuccinic acid, then adding ammonia to make it water-soluble. Unlike harsher cleansers such as sodium lauryl sulfate, it's designed to clean without stripping your skin's natural moisture barrier, making it a popular choice for gentle or baby-friendly formulas.
What does Diammonium Oleamido PEG-2 Sulfosuccinate do in a beauty product?
In a product, it reduces the surface tension between water and oil, allowing dirt, sebum, and makeup to be lifted from the skin and rinsed away. Its large molecular structure makes it less penetrating and less irritating than smaller surfactants.
Is Diammonium Oleamido PEG-2 Sulfosuccinate safe for most people?
Diammonium Oleamido PEG-2 Sulfosuccinate is considered safe for cosmetic use at typical concentrations. It has low irritation and comedogenic potential, making it suitable for sensitive skin. As with all PEG-containing ingredients, purity standards matter to avoid contaminants.
Who should be careful with Diammonium Oleamido PEG-2 Sulfosuccinate?
Individuals with known allergies to oleic acid or PEG derivatives (rare)
Research sources
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.