Ingredient review
C11-12 Isoparaffin
INCI: C11-12 Isoparaffin
A safe, lightweight emollient that helps products spread smoothly and evaporates quickly, leaving a non-greasy finish.
In plain English
C11-12 Isoparaffin is a synthetic oil-like ingredient made from petroleum. It is very lightweight and evaporates quickly when applied to the skin. This helps creams and lotions spread easily without feeling heavy or sticky. It is commonly used in sunscreens and makeup removers to improve texture and help other ingredients work better.
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
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
C11-12 Isoparaffin 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 C11-12 Isoparaffin.
- 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 mixture of hydrocarbon molecules with 11 to 12 carbon atoms, refined from petroleum to be very pure and stable. It is a clear, colorless liquid with low viscosity.
How it works
When applied, it temporarily reduces friction between the product and the skin, allowing for smooth, even application. Because it evaporates quickly, it leaves behind a thin, non-greasy layer that helps other active ingredients stay on the skin.
Pros
Lightweight feel
Evaporates quickly, so it doesn't leave a heavy or greasy residue, making it ideal for oily skin types.
Improves product performance
Helps sunscreens and makeup removers spread evenly, ensuring better coverage and more effective removal of makeup or sunscreen.
Cons and cautions
Petroleum-derived
Sourced from non-renewable petroleum, which may be a concern for those seeking more sustainable or plant-based alternatives.
Potential for dryness
Because it evaporates, it can take some natural moisture with it, which might be drying for very dry or sensitive skin if used in high concentrations.
Best for
- People with oily or combination skin who prefer lightweight textures
- Anyone using sunscreens or makeup removers that need to spread easily
Use caution if
- Those with very dry or compromised skin barriers who may prefer richer, non-volatile emollients
Usage tips
Safety summary
C11-12 Isoparaffin is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential. However, as a volatile hydrocarbon, it may cause dryness in some individuals, especially those with already dry skin.
Research notes
Safety assessments by the Cosmetic Ingredient Review (CIR) panel have concluded that isoparaffins, including C11-12, are safe for use in cosmetics. Studies show low acute toxicity and minimal skin irritation. There is limited research on long-term environmental impact.
Common label clues
- Typical concentration
- 1% to 10%
- Regulatory status
- Approved for use in cosmetics by the FDA and the European Commission. The Cosmetic Ingredient Review (CIR) panel has deemed it safe as used in cosmetics.
- Common uses
- Moisturizers, Sunscreens, Makeup removers, Hair conditioners
- Environmental note
- As a petroleum-derived ingredient, it is not biodegradable and may contribute to environmental concerns if not properly disposed of.
Good to know
- C11-12 Isoparaffin is considered safe by major regulatory bodies when used in cosmetics.
- It is often used in 'dry-touch' sunscreens to reduce stickiness.
Common questions
What is C11-12 Isoparaffin in beauty products?
C11-12 Isoparaffin is a synthetic oil-like ingredient made from petroleum. It is very lightweight and evaporates quickly when applied to the skin. This helps creams and lotions spread easily without feeling heavy or sticky. It is commonly used in sunscreens and makeup removers to improve texture and help other ingredients work better.
What does C11-12 Isoparaffin do in a beauty product?
When applied, it temporarily reduces friction between the product and the skin, allowing for smooth, even application. Because it evaporates quickly, it leaves behind a thin, non-greasy layer that helps other active ingredients stay on the skin.
Is C11-12 Isoparaffin safe for most people?
C11-12 Isoparaffin is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential. However, as a volatile hydrocarbon, it may cause dryness in some individuals, especially those with already dry skin.
Who should be careful with C11-12 Isoparaffin?
Those with very dry or compromised skin barriers who may prefer richer, non-volatile emollients
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.