Ingredient review
C11-13 Pareth-6
INCI: C11-13 PARETH-6
A gentle cleansing agent that helps remove dirt and oil without stripping the skin, but may cause mild irritation for very sensitive skin.
In plain English
C11-13 Pareth-6 is a synthetic ingredient that helps water mix with oil and dirt so they can be rinsed away. It's commonly found in cleansers and shampoos, where it creates a mild lather and leaves skin feeling clean but not overly dry. Think of it as a gentle helper that lifts away makeup, excess oil, and grime without being harsh.
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
C11-13 Pareth-6 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 C11-13 Pareth-6.
- 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
C11-13 Pareth-6 is a polyethylene glycol (PEG) ether of a mixture of synthetic C11-13 fatty alcohols. It belongs to the 'pareth' family of surfactants, which are known for their mild cleansing and emulsifying properties.
How it works
It reduces the surface tension between water and oil, allowing them to mix. This helps lift dirt, oil, and makeup from the skin so they can be rinsed away. It also helps stabilize emulsions, keeping oil and water blended in products like lotions and creams.
Pros
Mild cleansing
Effectively removes dirt and oil without over-drying, making it suitable for daily use on normal to combination skin.
Good emulsifier
Helps create stable, smooth formulas that feel pleasant on the skin and rinse off easily.
Cons and cautions
Potential irritation
While generally mild, it can cause slight stinging or redness for those with very sensitive or compromised skin.
Synthetic origin
As a PEG-derived compound, it may be avoided by those seeking fully natural or organic skincare products.
Best for
- People with normal to combination skin looking for a gentle cleanser
- Those who prefer mild, non-stripping surfactants in their daily routine
Use caution if
- Individuals with very sensitive, eczema-prone, or damaged skin barrier may want to patch test first
Usage tips
Safety summary
C11-13 Pareth-6 is considered safe for use in cosmetics at typical concentrations. It is a mild surfactant with low irritation potential, though patch testing is recommended for very sensitive skin. Regulatory bodies have not flagged significant safety concerns.
Research notes
Studies on pareth surfactants indicate they are effective cleansers with low skin irritation compared to traditional sulfates. However, individual sensitivity can vary, and more research is needed on long-term effects of PEG compounds.
Common label clues
- Typical concentration
- 1–10% in rinse-off products; lower in leave-on formulas
- Regulatory status
- Approved for use in cosmetics in the EU, US, and many other regions. No specific restrictions at typical concentrations.
- Common uses
- Cleansers, Shampoos, Body washes, Facial washes
- Environmental note
- C11-13 Pareth-6 is biodegradable and not expected to accumulate in the environment, making it a relatively eco-friendly surfactant choice.
Good to know
- Pareth ingredients are often used as alternatives to harsher sulfates like SLS.
- This ingredient is considered biodegradable and safe for aquatic life at typical use levels.
Common questions
What is C11-13 Pareth-6 in beauty products?
C11-13 Pareth-6 is a synthetic ingredient that helps water mix with oil and dirt so they can be rinsed away. It's commonly found in cleansers and shampoos, where it creates a mild lather and leaves skin feeling clean but not overly dry. Think of it as a gentle helper that lifts away makeup, excess oil, and grime without being harsh.
What does C11-13 Pareth-6 do in a beauty product?
It reduces the surface tension between water and oil, allowing them to mix. This helps lift dirt, oil, and makeup from the skin so they can be rinsed away. It also helps stabilize emulsions, keeping oil and water blended in products like lotions and creams.
Is C11-13 Pareth-6 safe for most people?
C11-13 Pareth-6 is considered safe for use in cosmetics at typical concentrations. It is a mild surfactant with low irritation potential, though patch testing is recommended for very sensitive skin. Regulatory bodies have not flagged significant safety concerns.
Who should be careful with C11-13 Pareth-6?
Individuals with very sensitive, eczema-prone, or damaged skin barrier may want to patch test first
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.