Ingredient review
Sodium Octoxynol-2 Sulfate
INCI: SODIUM OCTOXYNOL-2 SULFATE
A moderately strong synthetic cleanser that can be effective but may cause irritation for sensitive skin types.
In plain English
Sodium Octoxynol-2 Sulfate is a man-made ingredient that helps water mix with oil and dirt so they can be rinsed away. It's a type of surfactant, similar to the sudsy agents in many shampoos and body washes. While it cleans well, it can sometimes strip the skin of its natural oils, leading to dryness or irritation, especially for those with sensitive or dry skin.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Main practical flags: irritation is moderate; clogging risk is low.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- moderate
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Sodium Octoxynol-2 Sulfate can be useful, but watch for some irritation potential.
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 Octoxynol-2 Sulfate.
- 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
moderateCan bother some users, especially with frequent use, damaged skin, or strong companion ingredients.
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 synthetic anionic surfactant derived from octoxynol, a type of alkylphenol ethoxylate. It is produced through chemical processes and is not found in nature.
How it works
It reduces the surface tension between water and oil, allowing oils, dirt, and makeup to be emulsified and washed away. This makes it effective at cleansing but also potentially drying if used too frequently or at high concentrations.
Pros
Strong cleanser
Effectively removes excess oil, dirt, and makeup, leaving skin feeling clean.
Good lather
Creates a satisfying foam that many people associate with a thorough cleanse.
Cons and cautions
Potential irritation
Can cause redness, stinging, or dryness, especially for sensitive or dry skin types.
Strips natural oils
May over-cleanse and remove beneficial lipids, leading to a compromised moisture barrier over time.
Best for
- People with oily or combination skin
- Those who prefer a foaming cleanser
Use caution if
- People with dry, sensitive, or eczema-prone skin
- Those with compromised skin barriers
Usage tips
Safety summary
Generally considered safe for use in rinse-off cosmetics at typical concentrations, but can be irritating to sensitive skin. Prolonged or frequent use may disrupt the skin barrier. Environmental concerns exist regarding its persistence.
Research notes
Studies indicate that alkylphenol ethoxylates like octoxynol can be mild to moderate skin irritants. There is limited direct research on Sodium Octoxynol-2 Sulfate specifically, but its class is well-studied. The Cosmetic Ingredient Review (CIR) panel has reviewed related ingredients and found them safe for rinse-off use at low concentrations.
Common label clues
- Typical concentration
- Typically 1–10% in rinse-off products
- Regulatory status
- Approved for use in cosmetics in the US and EU within specified concentration limits. The EU has restrictions on alkylphenol ethoxylates due to environmental concerns.
- Common uses
- Shampoos, Body washes, Facial cleansers
- Environmental note
- Octoxynol compounds are alkylphenol ethoxylates, which have been scrutinized for potential environmental persistence and aquatic toxicity. Some regions restrict their use.
Good to know
- Sodium Octoxynol-2 Sulfate is sometimes used in combination with milder surfactants to reduce irritation.
- It is not typically found in high-end or 'clean' beauty products due to its synthetic nature and potential for irritation.
Common questions
What is Sodium Octoxynol-2 Sulfate in beauty products?
Sodium Octoxynol-2 Sulfate is a man-made ingredient that helps water mix with oil and dirt so they can be rinsed away. It's a type of surfactant, similar to the sudsy agents in many shampoos and body washes. While it cleans well, it can sometimes strip the skin of its natural oils, leading to dryness or irritation, especially for those with sensitive or dry skin.
What does Sodium Octoxynol-2 Sulfate do in a beauty product?
It reduces the surface tension between water and oil, allowing oils, dirt, and makeup to be emulsified and washed away. This makes it effective at cleansing but also potentially drying if used too frequently or at high concentrations.
Is Sodium Octoxynol-2 Sulfate safe for most people?
Generally considered safe for use in rinse-off cosmetics at typical concentrations, but can be irritating to sensitive skin. Prolonged or frequent use may disrupt the skin barrier. Environmental concerns exist regarding its persistence.
Who should be careful with Sodium Octoxynol-2 Sulfate?
People with dry, sensitive, or eczema-prone skin Those with compromised skin barriers
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.