Yellow 5 [1] ●
TL;DR. This ingredient is a synthetic colorant used to give products a bright it shade. It is mainly used in water-based formulas such as cleansers, gels, shampoos, bath products, and some makeup.
What does Yellow 5 [1] do in a cosmetic formula?
This ingredient is a synthetic colorant used to give products a bright it shade. It is mainly used in water-based formulas such as cleansers, gels, shampoos, bath products, and some makeup.
Is Yellow 5 [1] clean?
From a clean-beauty perspective, this ingredient has notable friction because many clean standards flag synthetic azo colorants and certified color additives. It is legally permitted in conventional cosmetics when regulatory purity and labeling requirements are met, but it is not a low-controversy choice for clean-positioned formulas.
Is Yellow 5 [1] sustainable?
This material is typically made from petrochemical feedstocks and requires controlled dye manufacturing and wastewater management. It is water-soluble and not considered a strong biodegradability fit compared with plant-derived or mineral color options.
Is Yellow 5 [1] COSMOS-approved?
This ingredient is not permitted under COSMOS-natural or COSMOS-organic standards because it is a synthetic colorant. Its Green Chemistry alignment is limited by petrochemical sourcing, multi-step synthesis, and persistence concerns in colored wastewater streams.
How does Yellow 5 [1] work chemically?
The molecule is an anionic, sulfonated azo dye supplied as a water-soluble salt, which lets it disperse readily in aqueous systems. It is typically used at very low tinting levels, often well below 1%, and can be affected by strong oxidizing or reducing agents and by interactions with cationic ingredients.
Last updated 2026-05-13