Database/Hair Dyeing/Acid Violet 9
Mostly petroleum · ISO 16128

Is Acid Violet 9 natural?

Mostly not. Synthetic xanthene dye core from petrochemical aromatics; only its sodium sulfonate salt fragment traces to mineral sulfur feedstock.

INCI nameAcid Violet 9
CAS6252-76-2
FormulaC34H26N2NaO6S+ · 613.6 Da
FunctionHair Dyeing
FeedstockThe xanthene dye backbone is built from petrochemical…

How we scored it

Na(23)+SO3(80) mineral=103 Da natural; xanthene dye core+carboxyl (511 Da) synthetic aromatic; total 614 Da. 103/614=0.17.
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

The xanthene dye backbone is built from petrochemical phenol/benzaldehyde-type aromatics via industrial dye synthesis. The sodium sulfonate group traces to mineral sulfuric acid used in the sulfonation step.

In plain English

A synthetic violet dye used in hair colouring. Its coloured core is entirely lab-made; only a small salt fragment traces to mineral sulfur.

CosIng definition: Acid Violet 9 is classed chemically as a xanthene color. It conforms to the formula:

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Structure

2D structure of Acid Violet 9

sodium 4-[[9-(2-carboxyphenyl)-6-(2-methylanilino)xanthen-10-ium-3-yl]amino]-3-methylbenzenesulfonate

PubChem CID 76968456 ↗

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. 2Acid Violet 9. PubChem CID 76968456. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3ACID VIOLET 9. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4ACID VIOLET 9. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=ACID%20VIOLET%209