Database/Colorant/CI 21108
100% petroleum · ISO 16128

Is CI 21108 natural?

No. Complex chlorinated, methoxylated disazo colorant from petrochemical aromatic amine intermediates; no natural fragments.

INCI nameCI 21108
CAS5567-15-7
FormulaC36H32Cl4N6O8 · 818.5 Da
FunctionColorant
FeedstockSynthesised by diazotising chlorinated, methoxylated aromatic amines and…

How we scored it

Disazo dye from chlorinated, methoxylated aniline intermediates; aromatic-amine diazo-coupling chemistry, entirely petrochemical.
What counts. ISO 16128-2 scores the atoms that remain in the final ingredient. Reagents, solvents, catalysts and protecting groups used during manufacture leave no mass behind and are not counted.

Where it comes from

Synthesised by diazotising chlorinated, methoxylated aromatic amines and coupling them to a dimethylaniline-based acceptor, all derived from petroleum-based benzene chemistry. No natural production route exists.

In plain English

A red-orange synthetic dye used in hair dye and colour cosmetic products. Manufactured entirely from petrochemical aromatic building blocks.

CosIng definition: CI 21108 is classed chemically as a disazo colour. It conforms to the formula:

Natural alternatives with the same function

Aluminum Powder 100% natural origin

Finely powdered aluminum metal used to add shimmer or color to cosmetics. It comes from refining bauxite ore,…

 Aluminum Stearate 100% natural origin

An aluminium salt of stearic acid, a fatty acid from vegetable or animal fat. Used to prevent caking,…

 Anthocyanins 100% natural origin

A natural colorant that gives products red, purple or blue tones. It is recovered from grape skins or…

 Calcium Ferrite 100% natural origin

A mineral pigment made of calcium and iron oxide, used as a colourant in cosmetics. It is produced…

 Calcium Stearate 100% natural origin

The calcium salt of stearic acid, a fatty acid usually from vegetable oils. Used as an anti-caking, thickening…

 Caramel 100% natural origin

A colouring and fragrance ingredient made by heating sugar, sucrose or glucose, until it browns. It comes from…

Structure

2D structure of CI 21108

2-[[2-chloro-4-[3-chloro-4-[[1-(4-chloro-2,5-dimethoxyanilino)-1,3-dioxobutan-2-yl]diazenyl]phenyl]phenyl]diazenyl]-N-(4-chloro-2,5-dimethoxyphenyl)-3-oxobutanamide

PubChem CID 21733 ↗

References

  1. 1ISO 16128-1:2016 and ISO 16128-2:2017 — Guidelines on technical definitions and criteria for natural and organic cosmetic ingredients and products. ISO, Geneva.
  2. 2CI 21108. PubChem CID 21733. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3CI 21108. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4CI 21108. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=CI%2021108