RED 40 ●
TL;DR. This ingredient is a synthetic colorant used to give products a bright red shade in liquids, gels, creams, oral care, and some rinse-off products. It contributes appearance only, not preservation, cleansing, or skin-conditioning performance.
What does RED 40 do in a cosmetic formula?
This ingredient is a synthetic colorant used to give products a bright red shade in liquids, gels, creams, oral care, and some rinse-off products. It contributes appearance only, not preservation, cleansing, or skin-conditioning performance.
Is RED 40 clean?
From a clean-beauty perspective, this ingredient has notable friction because many clean frameworks restrict or exclude synthetic petroleum-derived dyes. It is legally color-approved in many markets for specified uses, but sensitivity concerns and impurity controls make it less aligned with stricter standards.
Is RED 40 sustainable?
This material is typically made from petrochemical feedstocks through multi-step dye chemistry, so it is not renewable. It is used at very low levels, but synthetic azo colorants can be slow to break down in aquatic systems and may require wastewater controls during manufacturing.
Is RED 40 COSMOS-approved?
This ingredient is not permitted under COSMOS-natural or COSMOS-organic standards as a cosmetic colorant. Its petrochemical origin, synthetic dye-manufacturing route, and limited biodegradability make it a poor fit with Green Chemistry preferences, despite its high color strength at low dosage.
How does RED 40 work chemically?
The molecule is a water-soluble anionic monoazo dye, generally supplied as a salt or, in some applications, as an insoluble lake for improved dispersion in anhydrous or powder systems. Typical cosmetic use is color-to-shade, often well below 0.1%, and it can interact with cationic ingredients, bleed in high-water systems, or shift performance in the presence of strong oxidizing or reducing agents.
Last updated 2026-05-13