Ci 45100 / Acid Red 52 ●
TL;DR. This ingredient is a synthetic colorant used to give formulas a red to pink tone. It has no treatment role; its job is visual shade control in products such as color cosmetics, soaps, and rinse-off or leave-on formulas where permitted.
What does Ci 45100 / Acid Red 52 do in a cosmetic formula?
This ingredient is a synthetic colorant used to give formulas a red to pink tone. It has no treatment role; its job is visual shade control in products such as color cosmetics, soaps, and rinse-off or leave-on formulas where permitted.
Is Ci 45100 / Acid Red 52 clean?
Clean-beauty programs often flag it because it is a synthetic petroleum-derived dye and may be subject to color-additive restrictions and purity specifications. Skin tolerance is generally more about individual sensitivity and compliant grade than routine irritation, but it is not a low-friction clean-standard ingredient.
Is Ci 45100 / Acid Red 52 sustainable?
This material is made by multi-step synthetic chemistry from non-renewable aromatic feedstocks. As a highly colored, water-soluble dye, its sustainability profile depends on wastewater controls, and it is not a strong biodegradability story.
Is Ci 45100 / Acid Red 52 COSMOS-approved?
It is not permitted under COSMOS-natural or COSMOS-organic as a cosmetic colorant. Its fit with Green Chemistry is weak because it relies on non-renewable feedstocks, specialized synthesis, and limited evidence for ready biodegradation.
How does Ci 45100 / Acid Red 52 work chemically?
The molecule is an anionic sulfonated xanthene dye, which explains its water solubility, intense red-pink color, and fluorescence. It is typically used at very low levels, often well below 0.1%, and color strength can shift with formula matrix, pH, light exposure, and interactions with cationic materials.
Last updated 2026-05-13