Citral[2] ●
TL;DR. This ingredient is primarily used as a fragrance component, giving products a sharp lemon-like scent. It can also help build citrus, floral, and herbal fragrance profiles in very small amounts.
What does Citral[2] do in a cosmetic formula?
This ingredient is primarily used as a fragrance component, giving products a sharp lemon-like scent. It can also help build citrus, floral, and herbal fragrance profiles in very small amounts.
Is Citral[2] clean?
From a clean-beauty perspective, this ingredient is a known fragrance allergen and is subject to label declaration thresholds in the EU and UK when present above 0.001% in leave-on products or 0.01% in rinse-off products. It is not automatically a problem, but sensitive-skin formulas often treat it as a flagged fragrance component.
Is Citral[2] sustainable?
This material can be isolated from citrusy essential oils or made synthetically from terpene or petrochemical feedstocks, so sourcing matters. It is generally biodegradable and not considered highly persistent, though fragrance production can vary in land, crop, and solvent impacts.
Is Citral[2] COSMOS-approved?
It can fit COSMOS-natural or COSMOS-organic formulas when it comes from an allowed natural fragrance source and meets fragrance-standard requirements. Synthetic versions do not align as well, and its sensitization profile creates some Green Chemistry tradeoffs despite low use levels and biodegradability.
How does Citral[2] work chemically?
The molecule is an acyclic monoterpene aldehyde present as a mixture of two geometric isomers, which explains both its strong citrus odor and its reactivity. It is used at trace fragrance levels, is more prone to oxidation than many saturated aroma materials, and is commonly managed with antioxidants, airtight packaging, and IFRA-based concentration limits.
Last updated 2026-05-13