What Is C14-16 Isoalkane?
C14-16 Isoalkane, once listed as C14-16 Isoparaffin, is a blend of branched hydrocarbon molecules that each contain 14 to 16 carbon atoms. It comes from petroleum, where the raw oil is first distilled, then put through hydrocracking and isomerisation steps that shorten and rearrange the carbon chains into a more stable, high-purity form. Afterward the mixture is carefully fractionated to collect only the C14-16 range, giving a clear, low-odor liquid.
These branched molecules have been used for decades as the lighter, cleaner-feeling cousins of traditional mineral oil. When cosmetic chemists looked for an alternative that could dissolve oils yet feel weightless on skin they turned to isoalkanes, and the C14-16 cut soon became a staple. Today you will spot it in makeup removers, cleansing balms, long-wear foundations, sunscreen sprays, hair styling aerosols, body oils, deodorants, wipes and many other leave-on or rinse-off products where a quick-spreading, non-greasy carrier is needed.
C14-16 Isoalkane’s Cosmetic Benefits/Uses
C14-16 Isoalkane plays one key role in personal care formulas.
Solvent: It dissolves oily ingredients, pigments and active molecules, then keeps them evenly mixed so the product applies smoothly and dries without a heavy residue. This helps makeup go on evenly, sunscreen stay transparent, fragrance oils disperse and cleansing products lift away stubborn waterproof cosmetics while leaving skin comfortable rather than stripped.
Who Can Use C14-16 Isoalkane
C14-16 Isoalkane suits most skin types including oily, combination and sensitive skin because it is lightweight, non-occlusive and largely inert. Normal and slightly dry skin can also benefit, though those with very dry or eczema-prone skin may want to pair it with richer emollients since it offers little moisturising value on its own. The ingredient is petroleum derived and contains no animal components or by-products so it is considered suitable for vegans and vegetarians.
Current safety data show no specific risks for pregnant or breastfeeding women when C14-16 Isoalkane is applied topically. Still, this is not medical advice and anyone who is pregnant or nursing should discuss any skincare product with a qualified healthcare professional to be on the safe side.
The ingredient does not increase photosensitivity and there are no known interactions with common actives such as retinoids or acids. It is non-volatile in leave-on formats yet evaporates cleanly in sprays, making it broadly adaptable without special daytime precautions.
Potential Side Effects/Adverse Reactions
Responses to topical C14-16 Isoalkane vary from person to person. The effects listed below are possible yet uncommon when the ingredient is used correctly in a finished cosmetic formula
- Mild skin irritation – a small number of users may notice temporary redness or stinging, usually due to very sensitive skin or a compromised skin barrier
- Contact dermatitis – rare allergic reactions can occur, presenting as itching, rash or swelling
- Acne flare-ups – while the ingredient is generally non-comedogenic, pore-clogging is possible for some highly acne-prone individuals, especially if the formula also contains heavy waxes or butters
- Eye irritation – accidental contact, particularly from aerosol sprays, can lead to watering or burning sensations
- Respiratory discomfort – inhaling large amounts of aerosolised product may cause coughing or a scratchy throat in sensitive individuals
If any of the above reactions occur discontinue use immediately and seek advice from a healthcare professional if symptoms persist or worsen
Comedogenic Rating
Rating: 1 out of 5.
C14-16 Isoalkane earns a very low score because its branched structure and low viscosity let it sit on the surface without forming a thick, pore blocking film. It evaporates or wipes away easily in most formulas so it rarely has time to build up inside follicles. Independent evaluations of isoparaffin and isoalkane blends consistently classify them as non-comedogenic or only minimally comedogenic.
This makes the ingredient generally safe for those who are acne prone, though breakout-susceptible users should still pay attention to the total formula, especially if it also contains heavier waxes or butters.
Worth noting: products that leave a noticeable oily layer often use higher chain mineral oils, not C14-16 Isoalkane, so if a formula feels weightless the risk of pore congestion is even lower.
Summary
C14-16 Isoalkane functions mainly as a solvent, dissolving oils, pigments and actives so they spread smoothly and dry down without greasiness. Its branched hydrocarbons give it a lightweight slip that improves the feel of makeup, sunscreens, cleansing balms and sprays while helping formulas stay uniform.
The ingredient is fairly popular among cosmetic chemists looking for a clean feeling alternative to heavier mineral oils, though it is still less famous than silicones or plant esters in consumer conversations.
Current safety data show it is low risk for irritation, sensitisation and pore clogging when used as directed. As with any new product it is smart to do a quick patch test to confirm personal tolerance.