Ingredient review
C15-19 Alkane
INCI: C15-19 Alkane
A gentle, plant-derived emollient that provides a silky feel without clogging pores or causing irritation.
In plain English
C15-19 Alkane is a mixture of hydrocarbon chains (15 to 19 carbons long) derived from plant sources like coconut or palm. In skincare, it acts as a lightweight emollient, meaning it softens and smooths the skin by forming a thin, breathable film that reduces water loss. It feels silky and non-greasy, making it a popular alternative to silicones or mineral oils. Because it evaporates slowly, it helps other ingredients spread evenly and stay on the skin longer.
Review score
Safety, usefulness, and evidence
Strong fit for many routines
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
Easy yes for most routines
C15-19 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 C15-19 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
C15-19 Alkane is a blend of saturated hydrocarbons (alkanes) with carbon chain lengths between 15 and 19. It is typically produced by hydrogenating plant-derived fatty acids, resulting in a clear, odorless liquid that mimics the feel of silicones.
How it works
When applied to the skin, C15-19 Alkane spreads easily and forms a thin, non-occlusive layer. This layer helps lock in moisture by reducing transepidermal water loss (TEWL), while allowing the skin to breathe. Its low viscosity and surface tension also help other active ingredients spread more evenly.
Pros
Lightweight and non-greasy
C15-19 Alkane absorbs quickly without leaving a sticky or heavy residue, making it ideal for daytime use and for oily skin types.
Low irritation and comedogenic risk
It is generally well-tolerated and unlikely to clog pores, so it suits sensitive and acne-prone skin.
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.
Less occlusive for very dry skin
Because it is lightweight, it may not provide enough barrier support for severely dry or compromised skin without layering with a richer moisturizer.
Best for
- People with oily or combination skin who want lightweight hydration
- Anyone looking for a silicone-free, plant-based emollient
Use caution if
- Those with extremely dry skin may need a richer occlusive in addition
Usage tips
Safety summary
C15-19 Alkane is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, and no known toxicity concerns based on current research.
Research notes
Studies on alkanes of similar chain lengths show they are well-tolerated on skin and do not penetrate deeply. However, specific clinical data on C15-19 Alkane is limited, with safety largely inferred from related ingredients.
Common label clues
- Typical concentration
- 1–10%
- Regulatory status
- Approved for use in cosmetics globally, including by the EU CosIng database and the US FDA as a safe emollient.
- Common uses
- Moisturizers, Cleansers, Sunscreens, Makeup removers
- Environmental note
- While plant-derived, its environmental impact depends on the source crop. Palm-derived versions may contribute to deforestation unless certified by the Roundtable on Sustainable Palm Oil (RSPO).
Good to know
- C15-19 Alkane is often used as a silicone alternative in 'clean' beauty formulations.
- It is biodegradable and considered environmentally friendlier than some petroleum-derived ingredients.
Common questions
What is C15-19 Alkane in beauty products?
C15-19 Alkane is a mixture of hydrocarbon chains (15 to 19 carbons long) derived from plant sources like coconut or palm. In skincare, it acts as a lightweight emollient, meaning it softens and smooths the skin by forming a thin, breathable film that reduces water loss. It feels silky and non-greasy, making it a popular alternative to silicones or mineral oils. Because it evaporates slowly, it helps other ingredients spread evenly and stay on the skin longer.
What does C15-19 Alkane do in a beauty product?
When applied to the skin, C15-19 Alkane spreads easily and forms a thin, non-occlusive layer. This layer helps lock in moisture by reducing transepidermal water loss (TEWL), while allowing the skin to breathe. Its low viscosity and surface tension also help other active ingredients spread more evenly.
Is C15-19 Alkane safe for most people?
C15-19 Alkane is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, and no known toxicity concerns based on current research.
Who should be careful with C15-19 Alkane?
Those with extremely dry skin may need a richer occlusive in addition
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.