Hydrogenated Castor Oil/Sebacic Acid Copolymer

What is Hydrogenated Castor Oil/Sebacic Acid Copolymer?

Hydrogenated Castor Oil/Sebacic Acid Copolymer is a synthetic polymer created by combining hydrogenated castor oil, derived from the seeds of the Ricinus communis plant through hydrogenation for stability, with sebacic acid, a dicarboxylic acid also sourced from castor oil. This copolymer appears in cosmetics like lip products, hair styling aids, and moisturizers. It works by forming thin, flexible films on skin or hair surfaces, which provide a smooth, non-sticky barrier. This film improves product spreadability, reduces friction for easier application, and helps lock in moisture by mimicking natural lipids without greasiness. Its structure allows it to adhere well, enhancing wear time in long-lasting formulas while maintaining breathability.

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.
Hair conditioning
Improves softness, shine, and manageability by reducing friction and static; commonly achieved with cationic agents, silicones, oils, or conditioning polymers.
Skin conditioning agent
Maintains skin softness, smoothness, and flexibility.

Benefits

Provides emollient effects to smooth rough skin textures and improve slip during application.

Conditions hair by reducing friction, boosting shine and manageability.

Supports skin flexibility and softness as a conditioning agent in various formulas.

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 dry or rough skin seeking smoother texture.
Those with known allergies to castor oil derivatives.
Individuals with frizzy or unmanageable hair needing conditioning.
People sensitive to film-forming polymers in cosmetics.
Users of long-wear makeup or hair products for better adherence.
Individuals preferring completely mineral or oil-free formulations.

Safety Notes

  • Rated low hazard by EWG with scores of 1 across assessments.
  • Non-comedogenic with a rating of 0, unlikely to clog pores.

Frequently Asked Questions about Hydrogenated Castor Oil/Sebacic Acid Copolymer

What is Hydrogenated Castor Oil/Sebacic Acid Copolymer made from?

It combines hydrogenated castor oil from plant seeds with sebacic acid, both derived from castor sources.

Is it safe for daily skincare use?

It carries a low EWG hazard score of 1, indicating safety in typical cosmetic concentrations.

Does it cause breakouts?

No, it has a comedogenic rating of 0, making it suitable for acne-prone skin.