d-Limonene ●
TL;DR. This ingredient is primarily used as a fragrance component, adding a recognizable citrus note. It can also function as a solvent in cleansing, degreasing, and fragrance-dispersion systems.
What does d-Limonene do in a cosmetic formula?
This ingredient is primarily used as a fragrance component, adding a recognizable citrus note. It can also function as a solvent in cleansing, degreasing, and fragrance-dispersion systems.
Is d-Limonene clean?
From a clean-beauty perspective, this ingredient is acceptable but flagged because it is a declarable fragrance allergen in many markets. Sensitization risk is more associated with air-oxidized material, so freshness, antioxidant support, and packaging matter.
Is d-Limonene sustainable?
This material is commonly recovered from citrus peel processing, which can make it a useful renewable byproduct stream. It is readily biodegradable, but it is volatile and concentrated releases require responsible handling because of aquatic-impact concerns.
Is d-Limonene COSMOS-approved?
It is permitted under COSMOS natural or organic products when it comes from compliant natural fragrance or plant-derived sources and meets the standard’s fragrance rules. Its Green Chemistry fit is mixed, with strong marks for renewable sourcing and biodegradability, and weaker marks for volatility and oxidation-related allergen management.
How does d-Limonene work chemically?
The molecule is a chiral monocyclic monoterpene hydrocarbon with the formula C10H16, which explains its oil solubility, volatility, and strong odor impact at low levels. It is prone to oxidation in air and light, forming hydroperoxides and related oxidation products, so formulas often rely on antioxidants, opaque or airtight packaging, and low fragrance-use levels, commonly well below 1 percent in leave-on products.
Last updated 2026-05-13