Red 40 Red 33 ●
TL;DR. This ingredient is used as a colorant, adding a bright red to pink hue in rinse-off and leave-on personal care products. It is mainly chosen for strong tinting strength in water-based formulas.
What does Red 40 Red 33 do in a cosmetic formula?
This ingredient is used as a colorant, adding a bright red to pink hue in rinse-off and leave-on personal care products. It is mainly chosen for strong tinting strength in water-based formulas.
Is Red 40 Red 33 clean?
From a clean-beauty perspective, this ingredient has significant friction because it is a synthetic color additive and is commonly excluded by stricter retailer and certification standards. It is regulated for cosmetic use by region and product category, with attention to purity specifications and permitted applications.
Is Red 40 Red 33 sustainable?
This material is typically made from petrochemical-derived feedstocks and is not a strong fit for renewable sourcing. Its water solubility can make it mobile in wastewater, and synthetic dye molecules are generally less aligned with ready biodegradability expectations.
Is Red 40 Red 33 COSMOS-approved?
It is not permitted under COSMOS-natural or COSMOS-organic standards, which strongly limits its alignment with that framework. From a Green Chemistry perspective, the main drawbacks are nonrenewable feedstocks, multistep synthesis, and limited biodegradability.
How does Red 40 Red 33 work chemically?
This material consists of sulfonated synthetic azo dye molecules, usually supplied as salts, which gives high water solubility and strong color at trace to low use levels. It is best suited to aqueous systems, with performance influenced by pH, electrolytes, light exposure, and contact with strong oxidizing or reducing agents.
Last updated 2026-05-16