Isoeicosane

What is Isoeicosane?

Isoeicosane is a synthetic branched-chain hydrocarbon, specifically an isoparaffin with 20 carbon atoms, produced through petrochemical processes or from natural gas feedstocks. Highly purified for cosmetic applications, it falls into the category of light emollients and volatile solvents used in creams, serums, and makeup. In formulations, it functions by providing lubricity and slip, allowing smooth application without residue. Its emollient properties help mimic natural skin lipids to level surface imperfections, while its solvent action dissolves lipophilic ingredients, controls viscosity, and enables even distribution of actives. Due to its low molecular weight and volatility, it evaporates rapidly post-application, contributing to a non-greasy, matte finish in modern skincare and color cosmetics. This makes it suitable for oil-free or water-resistant products.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1 View on EWG →
PubChem View on PubChem →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Emollient
Softens and smooths skin by filling in surface roughness and improving slip; can also help reduce moisture loss when paired with occlusives and film formers.
Solvent
Dissolves and carries other ingredients, helping control viscosity, evaporation rate, and delivery of actives in both water- and oil-based systems.
Skin conditioning agent
Maintains skin softness, smoothness, and flexibility.

Benefits

Provides a smooth, silky texture to products for easy spreading.

Supports skin softness by filling surface gaps without heaviness.

Facilitates delivery of other ingredients through solvency properties.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
People with oily or combination skin seeking lightweight hydration.
Those with rare sensitivities to synthetic hydrocarbons.
Individuals preferring non-greasy, quick-absorbing formulas.
People experiencing reactions in patch-tested products containing it.
Users of mattifying or silicone-free alternatives in cosmetics.
Individuals avoiding petroleum-derived ingredients on personal preference.

Safety Notes

  • Considered low hazard with minimal risk of irritation or sensitization.
  • Non-comedogenic, unlikely to clog pores in most formulations.

Frequently Asked Questions about Isoeicosane

What is the main function of Isoeicosane in skincare?

It acts as an emollient to soften skin and a solvent to blend ingredients for smooth texture.

Is Isoeicosane safe for daily use?

Yes, it shows low hazard ratings and is suitable for most skin types in cosmetic products.

Does Isoeicosane feel greasy on skin?

No, its volatile nature allows quick evaporation for a dry, lightweight finish.