Hydrogenated Castor Oil Hydroxystearate

Hydrogenated castor oil hydroxystearate is a derivative of castor oil that has been chemically modified through hydrogenation and hydroxylation. This process converts the natural oil into a more stable, waxy substance that functions as both a skin conditioning agent and a rheology modifier—meaning it helps control the thickness and flow of skincare products.In formulations, it serves a dual purpose: it conditions the skin surface whilst simultaneously helping manufacturers achieve the desired texture and consistency of creams, serums and other products. It is classified as a non-ionic surfa…

Hydrogenated castor oil hydroxystearate works by creating an emollient film on the skin surface. Its molecular structure allows it to sit between water and oil-based components in formulations, helping them blend smoothly whilst also depositing a conditioning layer that reduces transepidermal water loss.As a rheology modifier, it thickens formulations without requiring large amounts of other thickening agents, which can sometimes feel heavy or occlusive. This allows formulators to create lightweight yet effective products.

This ingredient does not require specific usage instructions, as it is a formulation component rather than an active ingredient. Use your product as directed by the manufacturer. Because it is often found in emulsified creams and serums, ensure you are using compatible products together and patch-test if you have very sensitive skin.

Generally well-tolerated in skincare formulations. No major safety concerns are documented, though anyone with known sensitivity to castor oil derivatives should exercise caution.