PEG-40 Hydrogenated Castor Oil
PEG-40 Hydrogenated Castor Oil is a common emulsifier and solubiliser used in UK skincare and haircare to help blend oils with water. It creates lightweight, stable formulas in everything from facial cleansers and micellar waters to serums and hair mists. Gentle and effective, it improves texture without leaving a greasy feel.
How it works in skincare
In cosmetics PEG-40 Hydrogenated Castor Oil works as a non-ionic surfactant and emulsifying agent that allows oil-based ingredients to mix uniformly with water. Derived from castor oil, it helps stabilise emulsions, solubilise fragrances and essential oils, and improves the spreadability and rinse-off properties of cleansing products. It is widely used in British formulations to achieve clear, lightweight textures in micellar waters, oil cleansers, hair serums and cream-based skincare.
Key benefits
- Helps create stable oil-and-water emulsions
- Improves product texture and spreadability
- Allows gentle yet effective cleansing without residue
- Enhances solubility of fragrances and oils in water-based formulas
- Contributes to a lightweight, non-greasy feel
- Supports clear, elegant product appearance in serums and mists
Best for
all skin types, oily skin, combination skin, sensitive skin
Where it comes from
It is produced by reacting hydrogenated castor oil, obtained from the seeds of the Ricinus communis plant, with polyethylene glycol (PEG). The castor plant is native to eastern Africa but is now cultivated in many warm climates worldwide.