Database/Colorant/Solvent Green 7
Mostly natural · ISO 16128

Is Solvent Green 7 natural?

Mostly. The coal-tar-type pyrene dye core scores 0, but three sodium sulfonate groups count as mineral-origin by this site's convention, lifting the average.

INCI nameSolvent Green 7
CAS6358-69-6
FormulaC16H7Na3O10S3 · 524.4 Da
FunctionColorant · Hair Dyeing
FeedstockSolvent Green 7 is a synthetic pyrene sulfonic…

How we scored it

3x sodium sulfonate (mineral counter-ion, this site's convention) 309.15 Da + petrochemical hydroxypyrene core 215.23 Da = 524.4 Da; 309.15/524.4 = 0.59
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

Solvent Green 7 is a synthetic pyrene sulfonic acid dye, manufactured by sulfonating petrochemical pyrene and neutralising with sodium. There is no natural-origin production route for the dye core itself.

In plain English

A synthetic green dye used to colour hair. Its core structure is entirely man-made, though under site rules some of its weight comes from mineral sulfonate-sodium groups attached to it.

CosIng definition: Solvent Green 7 is classed chemically as a pyrene colour. It conforms to the formula:

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Structure

2D structure of Solvent Green 7

trisodium;8-hydroxypyrene-1,3,6-trisulfonate

PubChem CID 61388 ↗

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. 2Solvent Green 7. PubChem CID 61388. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3SOLVENT GREEN 7. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4SOLVENT GREEN 7. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=SOLVENT%20GREEN%207