Red 21 ●
TL;DR. This ingredient is a synthetic colorant used to give cosmetics bright pink-to-red tones, especially in lip, cheek, and nail products. It has no skin-care function beyond visual color.
What does Red 21 do in a cosmetic formula?
This ingredient is a synthetic colorant used to give cosmetics bright pink-to-red tones, especially in lip, cheek, and nail products. It has no skin-care function beyond visual color.
Is Red 21 clean?
From a clean-beauty perspective, it has friction because it is a synthetic, certified color additive with regulatory use limits and purity specifications. Many clean standards exclude or restrict this class due to petroleum-derived manufacturing and possible trace impurities managed by batch certification.
Is Red 21 sustainable?
This material is synthetically produced and is not a renewable plant or mineral input. Its halogenated aromatic structure is not a strong biodegradability fit, so its environmental profile is weaker than simple mineral pigments or plant-derived colorants.
Is Red 21 COSMOS-approved?
It is not permitted in COSMOS-natural or COSMOS-organic formulations as a synthetic colorant outside the standard’s allowed colorant framework. It has limited Green Chemistry alignment because it is synthetic, halogenated, and not readily tied to renewable feedstocks or rapid biodegradation.
How does Red 21 work chemically?
The molecule is a brominated xanthene dye, which gives strong visible color through an extended conjugated ring system. Use levels are governed by regional color-additive regulations and the product area, and formulators typically manage shade, bleeding, and stability through dispersion choice, lake form, and compatibility with oils, waxes, and film formers.
Last updated 2026-05-13