Ingredient review
C12-13 Pareth-7 Carboxylic Acid
INCI: C12-13 PARETH-7 CARBOXYLIC ACID
A gentle, effective surfactant that cleans without stripping the skin's natural moisture barrier.
In plain English
This ingredient is a mild cleansing agent that helps water mix with oil and dirt so they can be rinsed away. It's made from a fatty alcohol (from plant or synthetic sources) and ethylene oxide, then modified to be less harsh than traditional soaps. Because it's gentle, it's often used in products for 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.
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
C12-13 Pareth-7 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 C12-13 Pareth-7 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
C12-13 Pareth-7 Carboxylic Acid is a semi-synthetic surfactant and emulsifier. It belongs to the alkyl ether carboxylic acid family, known for their mildness and ability to clean without causing significant irritation or dryness.
How it works
It works by reducing the surface tension between water and oils, allowing them to mix. The carboxylic acid group gives it a slightly negative charge, which helps it lift away dirt, sebum, and makeup. Its mildness comes from its large, gentle molecular structure that doesn't penetrate deeply into the skin.
Pros
Mild on skin
Its large molecular structure means it cleans without penetrating the skin barrier, reducing irritation and dryness.
Effective cleanser
It lifts away oil-based impurities like sunscreen and makeup without leaving a greasy residue.
Cons and cautions
Synthetic origin
It is produced through chemical processing, which may not align with natural or minimalist skincare preferences.
Potential for slight dryness
At high concentrations or in leave-on products, it may still cause mild dryness for very sensitive skin types.
Best for
- People with dry or sensitive skin
- Those looking for a gentle daily cleanser
Use caution if
- Individuals seeking 100% natural ingredient lists
- Those with known sensitivity to ethoxylated compounds (rare)
Usage tips
Safety summary
C12-13 Pareth-7 Carboxylic Acid is considered safe for cosmetic use at typical concentrations. It has low irritation and comedogenic potential, making it suitable for most skin types. Rare allergic reactions are possible, as with any ingredient.
Research notes
Studies on alkyl ether carboxylic acids show they are among the mildest surfactants available, with minimal impact on skin barrier function. Most evidence comes from ingredient safety reviews and comparative surfactant studies.
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 other major markets. Generally recognized as safe when used as directed.
- Common uses
- Facial cleansers, Body washes, Shampoos, Makeup removers
- Environmental note
- As a semi-synthetic compound, it may not be fully biodegradable. However, many manufacturers are working on greener production methods.
Good to know
- This ingredient is often listed near the middle or end of an ingredient list, indicating moderate concentration.
- It is not a foaming agent on its own but works well in blends to create a creamy lather.
Common questions
What is C12-13 Pareth-7 Carboxylic Acid in beauty products?
This ingredient is a mild cleansing agent that helps water mix with oil and dirt so they can be rinsed away. It's made from a fatty alcohol (from plant or synthetic sources) and ethylene oxide, then modified to be less harsh than traditional soaps. Because it's gentle, it's often used in products for sensitive or dry skin.
What does C12-13 Pareth-7 Carboxylic Acid do in a beauty product?
It works by reducing the surface tension between water and oils, allowing them to mix. The carboxylic acid group gives it a slightly negative charge, which helps it lift away dirt, sebum, and makeup. Its mildness comes from its large, gentle molecular structure that doesn't penetrate deeply into the skin.
Is C12-13 Pareth-7 Carboxylic Acid safe for most people?
C12-13 Pareth-7 Carboxylic Acid is considered safe for cosmetic use at typical concentrations. It has low irritation and comedogenic potential, making it suitable for most skin types. Rare allergic reactions are possible, as with any ingredient.
Who should be careful with C12-13 Pareth-7 Carboxylic Acid?
Individuals seeking 100% natural ingredient lists Those with known sensitivity to ethoxylated compounds (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.