Ingredient review
C12-13 Pareth-15
INCI: C12-13 PARETH-15
A gentle synthetic surfactant that helps cleanse and emulsify without stripping the skin's natural moisture barrier.
In plain English
C12-13 Pareth-15 is a man-made cleansing ingredient that helps water mix with oil and dirt so they can be rinsed away. It's often used in gentle cleansers and shampoos because it cleans effectively without being too harsh or drying.
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
C12-13 Pareth-15 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 C12-13 Pareth-15.
- 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
C12-13 Pareth-15 is a synthetic surfactant (cleansing agent) made by reacting a blend of C12-13 fatty alcohols with about 15 units of ethylene oxide. This creates a molecule that can dissolve both oil and water, making it useful for cleansing and emulsifying.
How it works
In a cosmetic product, C12-13 Pareth-15 reduces the surface tension between water and oil, allowing them to mix. This helps lift dirt, makeup, and excess oil from the skin or hair so they can be rinsed away easily. It also helps stabilize emulsions (mixtures of oil and water) in creams and lotions.
Pros
Gentle cleansing
C12-13 Pareth-15 cleans effectively without stripping the skin's natural oils, making it suitable for daily use.
Good emulsifier
It helps blend oil and water phases in creams and lotions, resulting in a smooth, stable texture.
Cons and cautions
Potential irritation
At high concentrations, it may cause mild irritation or stinging in people with very sensitive or damaged skin.
Synthetic origin
As a synthetic ingredient, it may not be preferred by those seeking exclusively natural or plant-based formulations.
Best for
- People with normal to oily skin looking for a gentle but effective cleanser
- Those who use rinse-off products like face washes and shampoos
Use caution if
- Individuals with very sensitive or compromised skin barriers who prefer ultra-mild cleansers
Usage tips
Safety summary
C12-13 Pareth-15 is considered safe for use in cosmetics at typical concentrations. It may cause mild irritation in very sensitive individuals, especially in leave-on products. Regulatory bodies like the CIR have reviewed similar ingredients and found them safe.
Research notes
Studies on ethoxylated alcohols like C12-13 Pareth-15 indicate they are effective, mild surfactants with low toxicity. The CIR panel has concluded that related ingredients are safe for cosmetic use when formulated appropriately.
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. The Cosmetic Ingredient Review (CIR) panel has reviewed similar ethoxylated alcohols and found them safe at typical concentrations.
- Common uses
- Cleansers, Shampoos, Body washes, Makeup removers
- Environmental note
- C12-13 Pareth-15 is biodegradable, but its production involves ethylene oxide, which is derived from fossil fuels. Some consumers may prefer plant-based alternatives.
Good to know
- C12-13 Pareth-15 is part of the 'pareth' family, which are ethoxylated alcohols commonly used in mild cleansers
- It is biodegradable and generally considered safe in cosmetics at typical use levels
Common questions
What is C12-13 Pareth-15 in beauty products?
C12-13 Pareth-15 is a man-made cleansing ingredient that helps water mix with oil and dirt so they can be rinsed away. It's often used in gentle cleansers and shampoos because it cleans effectively without being too harsh or drying.
What does C12-13 Pareth-15 do in a beauty product?
In a cosmetic product, C12-13 Pareth-15 reduces the surface tension between water and oil, allowing them to mix. This helps lift dirt, makeup, and excess oil from the skin or hair so they can be rinsed away easily. It also helps stabilize emulsions (mixtures of oil and water) in creams and lotions.
Is C12-13 Pareth-15 safe for most people?
C12-13 Pareth-15 is considered safe for use in cosmetics at typical concentrations. It may cause mild irritation in very sensitive individuals, especially in leave-on products. Regulatory bodies like the CIR have reviewed similar ingredients and found them safe.
Who should be careful with C12-13 Pareth-15?
Individuals with very sensitive or compromised skin barriers who prefer ultra-mild cleansers
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.