Ingredient review
C13-C15 Alkane
INCI: C13-15 Alkane
A gentle, plant-derived emollient that spreads easily and leaves skin feeling smooth without clogging pores.
In plain English
C13-C15 Alkane is a lightweight oil-like ingredient made from plant sources like coconut or palm. It is used in skincare to help products glide on smoothly and leave a soft, silky finish without feeling greasy or heavy. Unlike some silicones or mineral oils, it is considered more natural and biodegradable.
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
- natural
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
C13-C15 Alkane 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 C13-C15 Alkane.
- 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
C13-C15 Alkane is a mixture of hydrocarbon chains (13 to 15 carbons long) derived from renewable plant sources. It is a clear, odorless liquid that acts as an emollient and solvent in cosmetic formulations.
How it works
It sits on the skin's surface to reduce water loss (transepidermal water loss, or TEWL) by forming a light, breathable film. This helps keep skin hydrated and soft. It also helps dissolve other ingredients and improves the spreadability of products.
Pros
Lightweight feel
Unlike heavier oils, C13-C15 Alkane absorbs quickly and leaves no sticky residue, making it ideal for daytime moisturizers and serums.
Low irritation potential
It is generally well-tolerated by most skin types, including sensitive skin, and has a low comedogenic rating, so it is unlikely to clog pores.
Cons and cautions
Sustainability concerns
If sourced from palm oil, it may contribute to deforestation unless certified sustainable. Look for brands that specify sustainable sourcing.
Limited humectant properties
It works as an emollient but does not actively attract water to the skin like glycerin or hyaluronic acid, so it is best paired with humectants.
Best for
- People with normal to dry skin looking for lightweight hydration
- Those who prefer plant-based, non-silicone emollients
Use caution if
- Individuals with known allergies to specific plant sources (e.g., coconut or palm)
Usage tips
Safety summary
C13-C15 Alkane is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, making it suitable for most skin types. Rare allergic reactions are possible.
Research notes
Research indicates that C13-C15 Alkane is a safe, effective emollient with a favorable skin compatibility profile. It is widely used in cosmetics as a silicone alternative. No significant safety concerns have been reported in peer-reviewed literature.
Common label clues
- Typical concentration
- 1% to 15%
- Regulatory status
- Approved for use in cosmetics globally, including by the U.S. FDA and EU CosIng database, with no known restrictions.
- Common uses
- Moisturizers, Serums, Sunscreens, Makeup removers, Hair products
- Environmental note
- Derived from renewable plant sources, but palm oil sourcing can impact rainforests. Look for RSPO-certified or coconut-derived versions for a more sustainable choice.
Good to know
- C13-C15 Alkane is often used as a silicone alternative in 'clean' beauty formulations.
- It is biodegradable and generally considered environmentally friendlier than petroleum-derived ingredients.
Common questions
What is C13-C15 Alkane in beauty products?
C13-C15 Alkane is a lightweight oil-like ingredient made from plant sources like coconut or palm. It is used in skincare to help products glide on smoothly and leave a soft, silky finish without feeling greasy or heavy. Unlike some silicones or mineral oils, it is considered more natural and biodegradable.
What does C13-C15 Alkane do in a beauty product?
It sits on the skin's surface to reduce water loss (transepidermal water loss, or TEWL) by forming a light, breathable film. This helps keep skin hydrated and soft. It also helps dissolve other ingredients and improves the spreadability of products.
Is C13-C15 Alkane safe for most people?
C13-C15 Alkane is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, making it suitable for most skin types. Rare allergic reactions are possible.
Who should be careful with C13-C15 Alkane?
Individuals with known allergies to specific plant sources (e.g., coconut or palm)
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.