Limonene[1][2][4] ●
TL;DR. This ingredient is primarily used as a fragrance component, adding a citrus scent profile. It can also function as a light solvent for oils, resins, and fragrance materials.
What does Limonene[1][2][4] do in a cosmetic formula?
This ingredient is primarily used as a fragrance component, adding a citrus scent profile. It can also function as a light solvent for oils, resins, and fragrance materials.
Is Limonene[1][2][4] clean?
From a clean-beauty perspective, this ingredient is acceptable but closely watched because it is a listed fragrance allergen in several regulatory systems. Its sensitization profile is mainly a concern after air oxidation, so freshness, antioxidants, and proper packaging matter.
Is Limonene[1][2][4] sustainable?
This material is commonly sourced from citrus peel streams, often as a byproduct of juice production, which gives it a strong renewable-sourcing story. It is readily biodegradable, but it is also a volatile organic compound, so large-scale emissions are a formulation and manufacturing consideration.
Is Limonene[1][2][4] COSMOS-approved?
It is permitted under COSMOS-natural and COSMOS-organic when it comes from compliant natural fragrance sources or essential oils, with allergen declaration where required. Its renewable origin and biodegradability fit Green Chemistry well, while volatility and oxidation sensitivity keep it from being a fully uncomplicated green signal.
How does Limonene[1][2][4] work chemically?
The molecule is a volatile, hydrophobic cyclic monoterpene hydrocarbon with the formula C10H16 and a boiling point around 176°C. In leave-on products it is usually present as a trace fragrance constituent to about 1%, while higher levels can appear in solvent-heavy or rinse-off formats, and air, heat, and light promote oxidation to sensitizing hydroperoxides.
Last updated 2026-05-13