Ingredient review
C14-15 Pareth-8 Carboxylic Acid
INCI: C14-15 PARETH-8 CARBOXYLIC ACID
A gentle, effective cleansing ingredient that helps remove dirt and oil without stripping the skin.
In plain English
This is a mild cleansing agent that helps water mix with oil and dirt so they can be rinsed away. It's often used in gentle cleansers and makeup removers because it cleans without leaving skin feeling tight or dry.
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
C14-15 Pareth-8 Carboxylic Acid 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 C14-15 Pareth-8 Carboxylic Acid.
- 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 made by reacting a fatty alcohol (C14-15) with ethylene oxide and then adding a carboxylic acid group. It belongs to a class of mild, anionic surfactants known for their gentle cleansing properties.
How it works
It reduces the surface tension between water and oil, allowing oils, dirt, and makeup to be emulsified and rinsed away. Its carboxylic acid group gives it mildness and good foaming properties, making it suitable for sensitive skin.
Pros
Very gentle on skin
Unlike harsher sulfates, this surfactant cleans effectively without causing tightness or irritation, making it ideal for daily use.
Good foam and rinse-off
It produces a pleasant, stable foam that rinses cleanly, leaving skin feeling refreshed rather than coated or greasy.
Cons and cautions
Semi-synthetic origin
It is derived from petrochemicals and ethylene oxide, which may be a concern for those seeking fully natural or plant-based ingredients.
Potential for mild dryness at high levels
In formulas with very high concentrations, it could still cause slight dryness, though this is uncommon in well-formulated products.
Best for
- People with normal to dry skin
- Those looking for a gentle, non-stripping cleanser
Use caution if
- Individuals with known sensitivity to ethoxylated ingredients (rare)
Usage tips
Safety summary
C14-15 Pareth-8 Carboxylic Acid is considered safe for use in cosmetics at typical concentrations. It is a mild surfactant with low irritation and comedogenic potential. As with all ethoxylated ingredients, trace amounts of 1,4-dioxane can form during manufacturing, but levels are tightly regulated and kept well below safety limits.
Research notes
Studies on similar ethoxylated carboxylic acids indicate they are well-tolerated on skin and eyes. The Cosmetic Ingredient Review (CIR) panel has reviewed related alkyl ether carboxylic acids and found them safe for cosmetic use. No specific long-term human studies were identified for this exact compound, but its safety profile is supported by analogy to closely related ingredients.
Common label clues
- Typical concentration
- 1–10% in rinse-off products; lower in leave-on formulations
- Regulatory status
- Approved for cosmetic use in the EU, US, and other major markets. No known restrictions at typical concentrations.
- Common uses
- Facial cleansers, Body washes, Shampoos, Makeup removers
- Environmental note
- It is biodegradable and not classified as a persistent environmental pollutant, though its production involves ethylene oxide, which requires careful industrial handling.
Good to know
- This ingredient is often listed alongside other ethoxylated compounds; it is not a fragrance or preservative.
- It is considered biodegradable and safe for aquatic environments at typical use levels.
Common questions
What is C14-15 Pareth-8 Carboxylic Acid in beauty products?
This is a mild cleansing agent that helps water mix with oil and dirt so they can be rinsed away. It's often used in gentle cleansers and makeup removers because it cleans without leaving skin feeling tight or dry.
What does C14-15 Pareth-8 Carboxylic Acid do in a beauty product?
It reduces the surface tension between water and oil, allowing oils, dirt, and makeup to be emulsified and rinsed away. Its carboxylic acid group gives it mildness and good foaming properties, making it suitable for sensitive skin.
Is C14-15 Pareth-8 Carboxylic Acid safe for most people?
C14-15 Pareth-8 Carboxylic Acid is considered safe for use in cosmetics at typical concentrations. It is a mild surfactant with low irritation and comedogenic potential. As with all ethoxylated ingredients, trace amounts of 1,4-dioxane can form during manufacturing, but levels are tightly regulated and kept well below safety limits.
Who should be careful with C14-15 Pareth-8 Carboxylic Acid?
Individuals with known sensitivity to ethoxylated ingredients (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.