Ingredient review

C12-13 Alkane/Cycloalkane

INCI: C12-13 ALKANE/CYCLOALKANE

A lightweight, silicone-like emollient that spreads easily and leaves a non-greasy finish, ideal for oil-free or lightweight formulas.

beautyskincareemollient

In plain English

This ingredient is a mix of hydrocarbon molecules (alkanes and cycloalkanes) with 12 to 13 carbon atoms. It feels very light and silky on the skin, similar to silicones, but it's made from petroleum or natural sources. It helps products spread smoothly, evaporates quickly, and leaves a soft, non-sticky feel. Because it's volatile, it doesn't sit heavy on the skin, making it great for lightweight moisturizers, sunscreens, and makeup removers.

Review score

Safety, usefulness, and evidence

4.0Good
4.0/ 5

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
synthetic
Evidence
moderate
Irritation
low
Clogging risk
low
How reviews are scored

Quick decision guide

Useful, but context matters

C12-13 Alkane/Cycloalkane 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.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging C12-13 Alkane/Cycloalkane.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. 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

low

Less likely to sting, burn, or bother most users, though sensitive skin can still react.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

moderate

There is useful support, but formula details and claim strength still matter.

What it is

A synthetic blend of linear and cyclic hydrocarbons (C12-C13) that acts as an emollient and solvent. It is often derived from petroleum or, in some cases, from renewable sources like coconut or palm oil.

How it works

When applied, it spreads easily across the skin, forming a thin, breathable film that softens the surface. Its volatile nature means it partially evaporates, leaving behind a silky, non-greasy feel without heavy residue. It also helps dissolve other ingredients and improves the texture of the product.

Pros

Lightweight feel

It evaporates quickly, leaving a silky, non-greasy finish that works well for oily skin types and under makeup.

Silicone alternative

For those who prefer to avoid silicones, this ingredient provides a similar texture and slip without the environmental concerns associated with some silicones.

Cons and cautions

Petroleum source

It is often derived from petroleum, which may not align with preferences for natural or sustainable ingredients.

Potential dryness

Because it is volatile and evaporates, it can leave very dry or compromised skin feeling tight or stripped if used in high amounts.

Best for

  • People with oily or combination skin who want a matte, non-greasy finish
  • Those looking for silicone-free alternatives in their skincare routine

Use caution if

  • Individuals with extremely dry or damaged skin may find it too lightweight or potentially drying

Usage tips

Use in lightweight moisturizers or serums for a matte finish.
Combine with humectants like glycerin to balance hydration if you have dry skin.

Safety summary

C12-13 Alkane/Cycloalkane is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, making it suitable for most skin types. However, like all volatile ingredients, it may cause dryness in very sensitive or compromised skin.

Research notes

There is limited peer-reviewed research specifically on this ingredient, but it is structurally similar to other safe hydrocarbons used in cosmetics. Safety assessments by industry panels (e.g., CIR) have found similar alkanes to be safe for topical use.

Common label clues

Typical concentration
1–20%
Regulatory status
Approved for use in cosmetics in the US, EU, and other major markets. No specific restrictions beyond general cosmetic safety requirements.
Common uses
Moisturizers, Serums, Sunscreens, Makeup removers, Hair products
Environmental note
When derived from petroleum, it has a higher carbon footprint. Some versions are sourced from renewable feedstocks like coconut or palm oil, which may have their own sustainability concerns.

Good to know

  • This ingredient is often labeled as a 'hydrocarbon' and can be derived from both petroleum and renewable sources.
  • It is considered a safe alternative to cyclomethicone and other cyclic silicones.

Common questions

What is C12-13 Alkane/Cycloalkane in beauty products?

This ingredient is a mix of hydrocarbon molecules (alkanes and cycloalkanes) with 12 to 13 carbon atoms. It feels very light and silky on the skin, similar to silicones, but it's made from petroleum or natural sources. It helps products spread smoothly, evaporates quickly, and leaves a soft, non-sticky feel. Because it's volatile, it doesn't sit heavy on the skin, making it great for lightweight moisturizers, sunscreens, and makeup removers.

What does C12-13 Alkane/Cycloalkane do in a beauty product?

When applied, it spreads easily across the skin, forming a thin, breathable film that softens the surface. Its volatile nature means it partially evaporates, leaving behind a silky, non-greasy feel without heavy residue. It also helps dissolve other ingredients and improves the texture of the product.

Is C12-13 Alkane/Cycloalkane safe for most people?

C12-13 Alkane/Cycloalkane is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, making it suitable for most skin types. However, like all volatile ingredients, it may cause dryness in very sensitive or compromised skin.

Who should be careful with C12-13 Alkane/Cycloalkane?

Individuals with extremely dry or damaged skin may find it too lightweight or potentially drying

Research sources

Cosmetic Ingredient Review (CIR) - Safety of HydrocarbonsOpenPubChem - C12-13 AlkanesOpenEWG Skin Deep - C12-13 Alkane/CycloalkaneOpen

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.