Di-C12-15 Alkyl Fumarate

What is Di-C12-15 Alkyl Fumarate?

Di-C12-15 Alkyl Fumarate is a synthetic diester derived from fumaric acid esterified with C12-15 linear alcohols. This clear, odorless liquid belongs to the class of alkyl fumarates commonly used in cosmetics. It appears in oil-based formulations such as lip products, foundations, sunscreens, and moisturizers. As an emollient, it lubricates the skin's surface, reducing friction and providing a smooth, velvety feel by mimicking natural lipids without greasiness. In its solvent role, it dissolves lipophilic actives and oils, enabling stable emulsions and controlled viscosity. This dual functionality enhances product spreadability, penetration of other ingredients, and overall sensory experience, particularly in anhydrous or lightweight formulas where a dry-touch finish is desired.

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

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.

Benefits

Provides a smooth, non-greasy feel by softening skin surface irregularities.

Facilitates even application and blending of oil-soluble components.

Supports moisture retention through improved barrier function when combined with other emollients.

Who It's For

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

Who May Benefit Who Should Avoid
Individuals with dry or rough skin seeking softness.
People with rare allergies to fumaric acid derivatives.
Those preferring lightweight, matte-finish products.
Those sensitive to synthetic esters in high concentrations.
Users of color cosmetics or sunscreens for better wear.
Individuals preferring fully natural ingredient profiles.

Safety Notes

  • Considered safe for cosmetic use with low hazard potential.
  • Non-comedogenic and unlikely to clog pores.

Frequently Asked Questions about Di-C12-15 Alkyl Fumarate

What does Di-C12-15 Alkyl Fumarate do in products?

It acts as an emollient to soften skin and a solvent to dissolve other ingredients for better texture and stability.

Is it safe for sensitive skin?

It has low irritation potential and is generally well-tolerated in cosmetics.

Does it cause acne?

No, it is non-comedogenic and does not clog pores.