What Is C13-15 Alkane?
C13-15 Alkane is a clear lightweight liquid made up of saturated hydrocarbons that each contain 13 to 15 carbon atoms. These straight chain molecules belong to the alkane family, which is why they are chemically stable and resistant to oxidation. Traditionally the blend is obtained from highly refined petroleum fractions, but modern producers also create it from renewable feedstocks such as sugarcane through a process called Fischer-Tropsch synthesis. The raw material is purified, distilled and filtered to remove impurities until it meets cosmetic standards.
The ingredient first gained traction in personal care during the early 2010s as formulators began searching for alternatives to silicones and mineral oil that would feel weightless yet still spread easily. Its silky slip and low odor made it a convenient swap in many anhydrous or low water systems, so it quickly appeared in a variety of products. Today you will find C13-15 Alkane in makeup removers, facial oils, sunscreens, pressed powders, hair serums, body lotions, solid moisturizers, masks and anti-aging blends where a smooth finish and quick absorption are desired.
C13-15 Alkane’s Cosmetic Benefits/Uses
While it has only one official role on ingredient labels, that role has several practical payoffs in a formula.
Solvent: C13-15 Alkane helps dissolve and evenly disperse oil-soluble actives, pigments and fragrances so they stay stable and uniform throughout the product. Because it is lightweight and non greasy it boosts spreadability and gives formulas a soft elegant feel without leaving a heavy film. This makes creams and color cosmetics easier to apply and helps them sit comfortably on skin or hair.
Who Can Use C13-15 Alkane
C13-15 Alkane is generally suitable for all skin types including oily, combination, normal and sensitive because it is lightweight and does not leave an occlusive film that might trap sebum or bacteria. Extremely dry skin may still need a richer emollient or occlusive on top since this ingredient itself does not supply moisture.
The blend is sourced either from petroleum fractions or renewable crops like sugarcane but it contains no animal-derived materials, making products that use it appropriate for vegans and vegetarians. If you prefer a plant origin specifically, look for brands that disclose bio-based sourcing.
Current safety data show no reproductive or developmental concerns so it is considered safe for people who are pregnant or breastfeeding. This is not medical advice and anyone who is pregnant or nursing should confirm any skincare choice with a qualified healthcare professional.
C13-15 Alkane does not absorb UV light and has no known photo-sensitising properties so it will not make skin more prone to sunburn. It is also fragrance-free and non volatile at room temperature which makes it well tolerated by those who are sensitive to strong scents.
Potential Side Effects/Adverse Reactions
Side effects from topical C13-15 Alkane vary from person to person. The issues noted below are only potential reactions and are unlikely for most users when the ingredient is used at normal cosmetic levels.
- Mild skin irritation: very rare stinging or redness can occur, usually in individuals with compromised or highly reactive skin
- Contact dermatitis: an allergic response is possible but uncommon, typically linked to residual impurities rather than the alkane itself
- Eye irritation: may cause watering or discomfort if the product accidentally gets into the eyes
- Respiratory irritation: inhaling fine droplets from sprays or aerosols that contain C13-15 Alkane can occasionally provoke coughing or a scratchy throat
If any discomfort or adverse effect develops stop using the product and seek advice from a healthcare professional.
Comedogenic Rating
Rating: 1/5
C13-15 Alkane is a low viscosity hydrocarbon that spreads quickly without forming a heavy occlusive film so it rarely traps sebum or debris in pores. Its straight chain molecules sit on the surface then evaporate or are wiped away rather than penetrating follicular openings. For that reason it has a very low likelihood of clogging pores and is generally considered suitable for acne-prone or breakout-prone skin. As with any ingredient overall comedogenicity can shift depending on the full formula, concentration and the presence of heavier oils or waxes.
Summary
C13-15 Alkane’s primary job in cosmetics is to act as a lightweight solvent that dissolves oil-based actives pigments and fragrances while giving products a silky slip and quick dry finish. By lowering viscosity it helps creams, serums and color cosmetics glide on evenly, improving spreadability and sensory appeal without leaving a greasy residue.
Its popularity has risen steadily over the past decade as brands look for alternatives to silicones and mineral oil that align with clean beauty and bio-based sourcing claims, though it is still less common than classic emollients in mass market lines.
Current safety data classify C13-15 Alkane as low risk for irritation, sensitization or systemic toxicity making it a reliable choice for most users including those with sensitive skin. Even so it is always wise to perform a small patch test when trying any new product to confirm personal tolerance.