Rapeseed Acid

What is Rapeseed Acid?

Rapeseed Acid consists of a mix of fatty acids extracted from rapeseed oil, sourced from the seeds of the Brassica napus plant. This vegetable-derived ingredient falls into the category of anionic surfactants commonly used in personal care products such as shampoos, shower gels, facial cleansers, and body washes. In formulations, it works by decreasing the surface tension at the interface of water and oils on the skin or hair, which enables dirt, excess sebum, and residues to be solubilized and rinsed off effectively. By forming micelles—tiny structures that trap hydrophobic substances—it supports thorough cleansing while aiding in the creation of lather and stable emulsions. Its origin from renewable plant sources makes it a popular choice for milder, nature-inspired cleansing systems in cosmetics.

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:

Surfactant
Lowers surface tension to enable cleansing, emulsifying, and foaming; central to shampoos, body washes, and many emulsions and micellar systems.
Cleansing agent
Removes dirt, oil, and impurities by lowering surface tension and forming micelles, enabling soils to be lifted and rinsed away from skin, hair, or teeth.

Benefits

Supports gentle removal of dirt and oils through micelle formation.

Enhances foaming and emulsification in cleansers and washes.

Contributes to non-comedogenic cleansing suitable for daily use.

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 preferring plant-based surfactants in their routines.
Those with known allergies to rapeseed or mustard family plants.
Users of shampoos and body washes seeking mild lather.
Individuals sensitive to fatty acid-based surfactants.
People with normal or oily skin needing effective yet non-stripping cleansers.
People using products with high concentrations if patch testing reveals irritation.

Safety Notes

  • Rated low hazard by environmental working groups based on available data.
  • Generally recognized as safe in cosmetic concentrations by review panels.

Frequently Asked Questions about Rapeseed Acid

What is Rapeseed Acid used for in cosmetics?

It serves as a surfactant and cleansing agent in shampoos, body washes, and facial cleansers to remove impurities via micelle formation.

Is Rapeseed Acid safe for sensitive skin?

It has a low hazard rating and is mild in typical rinse-off formulations, but patch test if concerned about sensitivities.

Does Rapeseed Acid come from natural sources?

Yes, it's derived from fatty acids in rapeseed oil from Brassica napus plants.