CI 45410[1] ●
TL;DR. This ingredient is a synthetic red-pink colorant used to tint makeup, lip products, and some personal care formulas. It can also create a pH-responsive staining effect in anhydrous or semi-anhydrous color cosmetics.
What does CI 45410[1] do in a cosmetic formula?
This ingredient is a synthetic red-pink colorant used to tint makeup, lip products, and some personal care formulas. It can also create a pH-responsive staining effect in anhydrous or semi-anhydrous color cosmetics.
Is CI 45410[1] clean?
From a clean-beauty perspective, this ingredient has friction because it is a synthetic certified color additive with regional use limits and batch-purity requirements. It is not a common skin sensitizer, but it is often restricted by cleaner standards that limit synthetic dyes.
Is CI 45410[1] sustainable?
This material is typically made through petrochemical-based, multi-step synthesis rather than renewable sourcing. Its halogenated aromatic structure is not a strong fit for ready biodegradability, so wastewater persistence is a reasonable environmental concern.
Is CI 45410[1] COSMOS-approved?
It is not permitted under COSMOS-natural or COSMOS-organic standards because synthetic organic colorants are generally outside the standard. Its Green Chemistry alignment is weak due to nonrenewable feedstocks, halogenated chemistry, and limited biodegradability.
How does CI 45410[1] work chemically?
The molecule belongs to the halogenated fluorescein dye family, with a conjugated ring system that produces strong red-pink coloration and can shift appearance with ionization state and surrounding medium. It is usually used at low shade-adjusting levels, often well below 1%, and formulation choices such as oil phase, wax structure, pH, and permitted-use category determine performance.
Last updated 2026-05-13