Glyceryl Undecylenate

Benefits
AntisepticSoftening

What is Glyceryl Undecylenate?

Glyceryl Undecylenate is a monoester formed from glycerin and undecylenic acid, the latter derived from the thermal decomposition of castor oil sourced from Ricinus communis seeds. This biodegradable, lipid-like compound falls into the fatty acid ester family widely employed in rinse-off and leave-on cosmetics such as lotions, creams, shampoos, and cleansers. It works as an emollient by depositing a thin lipid layer that lubricates the skin surface, enhancing suppleness and reducing friction. As a surfactant-emulsifier, it lowers interfacial tension between oil and water, promoting stable dispersions and creamy consistencies while aiding gentle cleansing. The undecylenic acid component provides broad-spectrum antimicrobial effects against fungi and bacteria, supporting formulation preservation without harsh preservatives. Its mild nature suits diverse product types, contributing to sensory appeal and efficacy.

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.
Surfactant
Lowers surface tension to enable cleansing, emulsifying, and foaming; central to shampoos, body washes, and many emulsions and micellar systems.
Emulsifying agent
Enables stable mixing of oil and water phases by forming an interfacial film, helping create lotions, creams, and cleansers with consistent texture.
Skin conditioning agent
Maintains skin softness, smoothness, and flexibility.

Benefits

Delivers softening effects for smoother skin texture.

Provides antiseptic properties to support product stability.

Enhances emulsification for uniform, pleasant product feel.

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 emollient hydration.
People with rare allergies to castor oil derivatives.
Users of cleansers and lotions wanting stable, gentle formulas.
Individuals sensitive to undecylenic acid-related compounds.
Those preferring multifunctional, plant-based cosmetic ingredients.
Those experiencing irritation from fatty acid esters.

Safety Notes

  • Considered low hazard with minimal risk in typical use.
  • Non-comedogenic, unlikely to clog pores.

Frequently Asked Questions about Glyceryl Undecylenate

What is glyceryl undecylenate derived from?

It's a glycerin ester of undecylenic acid from castor oil pyrolysis.

Is it safe for sensitive skin?

Low irritation potential suits most skin types in cosmetics.

What products commonly include it?

Found in creams, lotions, cleansers, and shampoos for texture and stability.