Database/Hair Dyeing/Solvent Orange 1
100% petroleum · ISO 16128

Is Solvent Orange 1 natural?

No. Synthetic monoazo colourant made by coupling petrochemical aromatic amine and phenol intermediates; no natural production route exists.

INCI nameSolvent Orange 1
CAS2051-85-6
FormulaC12H10N2O2 · 214.22 Da
FunctionHair Dyeing
FeedstockProduced by azo coupling of petrochemical aniline and…

How we scored it

Whole molecule C12H10N2O2 is a monoazo dye; both aromatic rings from petrochemical phenol/aniline, no natural fragment. 0/214=0.0.
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

Produced by azo coupling of petrochemical aniline and resorcinol-type aromatics. Used purely as a synthetic colorant with no plant-based alternative.

In plain English

A synthetic orange dye used as a colorant, built entirely from lab-made aromatic chemicals derived from petroleum. No plant or natural origin.

CosIng definition: Solvent Orange 1 is classed chemically as a monoazo colour. It conforms to the formula:

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Structure

2D structure of Solvent Orange 1

4-phenyldiazenylbenzene-1,3-diol

PubChem CID 16325 ↗

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 Orange 1. PubChem CID 16325. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3SOLVENT ORANGE 1. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4SOLVENT ORANGE 1. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=SOLVENT%20ORANGE%201