Ingredient review
Nonadecane
INCI: NONADECANE
Nonadecane is a gentle, lightweight emollient that helps soften skin and improve product texture without clogging pores.
In plain English
Nonadecane is a type of oil molecule that comes from plants. It feels very light on the skin, not greasy or heavy, and helps other ingredients spread smoothly. It also helps keep moisture in by forming a thin, breathable layer on the skin's surface.
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
Nonadecane 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 Nonadecane.
- 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
Nonadecane is a saturated hydrocarbon (a chain of 19 carbon atoms) found naturally in some plant waxes and essential oils. In cosmetics, it is often derived from plant sources like coconut or palm oil.
How it works
As an emollient, nonadecane fills in the tiny gaps between skin cells, making the skin feel smoother and softer. It also acts as a solvent, helping to dissolve other ingredients and improve the texture of a product so it glides on easily.
Pros
Lightweight feel
Unlike heavier oils, nonadecane absorbs quickly and leaves no greasy residue, making it ideal for daytime use or under makeup.
Low irritation potential
Nonadecane is considered very gentle and is unlikely to cause redness or stinging, even for sensitive skin types.
Cons and cautions
Limited moisturizing power
As a lightweight emollient, it may not provide enough hydration for very dry or dehydrated skin without additional humectants or occlusives.
Sustainability concerns
Nonadecane is often sourced from palm oil, which can be linked to deforestation unless certified sustainable.
Best for
- People with oily or combination skin who want lightweight hydration
- Anyone looking for a non-comedogenic emollient in their routine
Use caution if
- Those with a known allergy to hydrocarbons (rare)
- Individuals seeking a rich, occlusive moisturizer for very dry skin
Usage tips
Safety summary
Nonadecane is considered safe for cosmetic use with a low risk of irritation or comedogenicity. It is not known to be toxic or sensitizing at typical concentrations.
Research notes
Research on nonadecane is limited but consistent with other linear alkanes used in cosmetics. It is generally recognized as safe by cosmetic ingredient review panels, though most evidence comes from its structural similarity to other safe hydrocarbons.
Common label clues
- Typical concentration
- 1% to 10%
- Regulatory status
- Nonadecane is approved for use in cosmetics in the US, EU, and many other regions. It is not classified as a hazardous substance at typical cosmetic concentrations.
- Common uses
- Moisturizers, Cleansers, Makeup removers, Serums
- Environmental note
- Nonadecane is biodegradable, but its production from palm oil can contribute to habitat loss. Look for products using RSPO-certified palm oil or plant-based alternatives.
Good to know
- Nonadecane is often used alongside other hydrocarbons like isododecane in makeup removers to dissolve long-wear makeup.
- It evaporates slowly, so it stays on the skin longer than some volatile silicones.
Common questions
What is Nonadecane in beauty products?
Nonadecane is a type of oil molecule that comes from plants. It feels very light on the skin, not greasy or heavy, and helps other ingredients spread smoothly. It also helps keep moisture in by forming a thin, breathable layer on the skin's surface.
What does Nonadecane do in a beauty product?
As an emollient, nonadecane fills in the tiny gaps between skin cells, making the skin feel smoother and softer. It also acts as a solvent, helping to dissolve other ingredients and improve the texture of a product so it glides on easily.
Is Nonadecane safe for most people?
Nonadecane is considered safe for cosmetic use with a low risk of irritation or comedogenicity. It is not known to be toxic or sensitizing at typical concentrations.
Who should be careful with Nonadecane?
Those with a known allergy to hydrocarbons (rare) Individuals seeking a rich, occlusive moisturizer for very dry skin
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.