CI19140/Yellow 5 ●
TL;DR. It is a water-soluble synthetic colorant used to give formulas a bright lemon-toned hue and keep shade consistent across batches.
What does CI19140/Yellow 5 do in a cosmetic formula?
It is a water-soluble synthetic colorant used to give formulas a bright lemon-toned hue and keep shade consistent across batches.
Is CI19140/Yellow 5 clean?
This ingredient is permitted as a regulated color additive in major markets, but it has clean-standard friction because many natural-leaning frameworks restrict synthetic dyes. A small subset of users can report sensitivity reactions, so clear labeling matters.
Is CI19140/Yellow 5 sustainable?
It is usually made from petroleum-derived aromatic feedstocks through multi-step synthesis. It is water-soluble, but synthetic azo colorants can be slow to break down in wastewater and can add aquatic color load if not well treated.
Is CI19140/Yellow 5 COSMOS-approved?
It is not permitted in COSMOS-natural or COSMOS-organic finished products because the standard largely limits colorants to approved natural or nature-identical mineral sources. Its petrochemical origin, multi-step synthesis, and limited biodegradability fit Green Chemistry only weakly.
How does CI19140/Yellow 5 work chemically?
The molecule is an anionic sulfonated monoazo colorant, commonly supplied as a sodium salt, so it dissolves readily in water and is poorly suited to anhydrous oils unless converted into an insoluble lake. It is typically used at trace levels, often about 0.001% to 0.1% depending on shade, and can fade with strong oxidizers, reducing agents, high heat, or intense light.
Last updated 2026-08-29