Limonene ●
TL;DR. This ingredient is primarily used as a fragrance component, especially for citrus notes. It can also act as a light solvent for oily materials in some formulations.
What does Limonene do in a cosmetic formula?
This ingredient is primarily used as a fragrance component, especially for citrus notes. It can also act as a light solvent for oily materials in some formulations.
Is Limonene clean?
From a clean-beauty perspective, this ingredient has friction because it is a regulated fragrance allergen and can become more sensitizing after oxidation. It is commonly accepted when properly disclosed and used within fragrance safety limits.
Is Limonene sustainable?
This material is often sourced from citrus peel, a byproduct of juice processing, which gives it a favorable feedstock story. It is readily biodegradable, but its volatility and oxidation profile require careful handling and storage.
Is Limonene COSMOS-approved?
It is permitted under COSMOS when it is naturally derived and used as part of a compliant fragrance system. Its renewable sourcing and biodegradability fit Green Chemistry well, while allergen disclosure and oxidation control are the main caveats.
How does Limonene work chemically?
The molecule is a volatile monocyclic monoterpene hydrocarbon with the formula C10H16, used at low fragrance levels in many leave-on products and sometimes higher in rinse-off or cleansing formats. It oxidizes with air, light, and heat to form hydroperoxides, so antioxidants, minimal headspace, and opaque or well-sealed packaging improve stability.
Last updated 2026-05-13