Ingredient review
C12-14 Sec-Pareth-7
INCI: C12-14 SEC-PARETH-7
A mild synthetic surfactant that helps cleansers foam and rinse cleanly, but may be slightly drying for very sensitive skin.
In plain English
This ingredient is a type of synthetic detergent made from a fatty alcohol (C12-14) and ethylene oxide. It helps water and oil mix together so that dirt and makeup can be rinsed away. The '7' means it has a moderate water-loving character, making it a good all-purpose cleanser that isn't too harsh or too gentle.
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
C12-14 Sec-Pareth-7 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 C12-14 Sec-Pareth-7.
- 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 secondary alcohol ethoxylate surfactant with an average of 7 ethylene oxide units, derived from petrochemical sources.
How it works
It lowers the surface tension between water and oil, allowing them to blend into a stable emulsion. In a cleanser, it surrounds dirt and oil particles so they can be lifted off the skin and rinsed away with water.
Pros
Mild cleansing
Compared to traditional sulfates like SLS, C12-14 Sec-Pareth-7 is generally less irritating while still providing good foam and oil removal.
Versatile formulator
It works well in both rinse-off and leave-on products, helping to stabilize emulsions and improve product texture.
Cons and cautions
Potential dryness
On very sensitive or dry skin, repeated use may strip natural oils, leading to tightness or irritation.
Synthetic origin
It is derived from petrochemicals, which may be a concern for those seeking natural or biodegradable alternatives.
Best for
- People with normal to oily skin looking for a reliable cleanser
- Those who prefer synthetic surfactants over sulfate-based ones
Use caution if
- Individuals with very dry or eczema-prone skin who may find it too stripping
- Anyone seeking a completely natural or plant-derived ingredient list
Usage tips
Safety summary
C12-14 Sec-Pareth-7 is considered safe for use in cosmetics at typical concentrations. It has low acute toxicity and is not a known sensitizer, though it can cause mild irritation in high concentrations or on compromised skin.
Research notes
Studies on secondary alcohol ethoxylates indicate they are less irritating than linear counterparts and have favorable biodegradability. However, long-term human safety data specific to this exact chain length and ethoxylation level is limited.
Common label clues
- Typical concentration
- 1–10% in rinse-off products; lower in leave-on products
- Regulatory status
- Approved for use in cosmetics in the EU, US, and most major markets. Subject to purity and ethoxylation limits under cosmetic regulations.
- Common uses
- Cleansers, Shampoos, Body washes, Emulsions
- Environmental note
- Secondary alcohol ethoxylates are generally considered more biodegradable than linear ones, but they are still synthetic and derived from non-renewable sources.
Good to know
- The 'sec' in the name indicates a secondary alcohol structure, which often provides better biodegradability than linear alcohol ethoxylates.
- It is commonly used in sulfate-free formulations as a gentler alternative.
Common questions
What is C12-14 Sec-Pareth-7 in beauty products?
This ingredient is a type of synthetic detergent made from a fatty alcohol (C12-14) and ethylene oxide. It helps water and oil mix together so that dirt and makeup can be rinsed away. The '7' means it has a moderate water-loving character, making it a good all-purpose cleanser that isn't too harsh or too gentle.
What does C12-14 Sec-Pareth-7 do in a beauty product?
It lowers the surface tension between water and oil, allowing them to blend into a stable emulsion. In a cleanser, it surrounds dirt and oil particles so they can be lifted off the skin and rinsed away with water.
Is C12-14 Sec-Pareth-7 safe for most people?
C12-14 Sec-Pareth-7 is considered safe for use in cosmetics at typical concentrations. It has low acute toxicity and is not a known sensitizer, though it can cause mild irritation in high concentrations or on compromised skin.
Who should be careful with C12-14 Sec-Pareth-7?
Individuals with very dry or eczema-prone skin who may find it too stripping Anyone seeking a completely natural or plant-derived ingredient list
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.