BLUE 1 ●
TL;DR. This ingredient is a synthetic color additive used to tint personal care formulas and keep product color consistent across batches. It is decorative only and does not provide a skin-care active benefit.
What does BLUE 1 do in a cosmetic formula?
This ingredient is a synthetic color additive used to tint personal care formulas and keep product color consistent across batches. It is decorative only and does not provide a skin-care active benefit.
Is BLUE 1 clean?
From a clean-beauty perspective, this ingredient has friction because it is a synthetic dye rather than a minimally processed mineral or botanical colorant. It is regulated for cosmetic use in many markets, but some clean standards restrict or exclude it, and rare sensitivity reactions have been reported.
Is BLUE 1 sustainable?
This material is typically made from petrochemical feedstocks through multi-step synthesis. It is water-soluble but not considered readily biodegradable, so its environmental profile is less aligned with low-persistence ingredient design.
Is BLUE 1 COSMOS-approved?
This ingredient is not permitted under COSMOS-organic or COSMOS-natural standards. Its petrochemical origin, synthetic dye chemistry, and limited biodegradability make it a weak fit with Green Chemistry priorities.
How does BLUE 1 work chemically?
The molecule is a highly water-soluble, anionic, sulfonated triarylmethane dye used at very low levels, often below 0.1%, depending on shade target and product type. It is most compatible with aqueous systems, can interact with cationic polymers or surfactants, and may show color fading under strong light or strongly oxidizing conditions.
Last updated 2026-05-13