Database/Hair Dyeing/2-Naphthol
100% petroleum · ISO 16128

Is 2-Naphthol natural?

No. 2-Naphthol is derived entirely from petroleum or coal-tar naphthalene; no natural-origin mass is present.

INCI name2-Naphthol
CAS135-19-3
FormulaC10H8O · 144.17 Da
FunctionHair Dyeing · Perfuming
FeedstockManufactured by sulfonation and alkali fusion of naphthalene,…

How we scored it

Naphthalen-2-ol; naphthalene is a coal-tar/petroleum aromatic (benzene-derivative class). No natural fragment. 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

Manufactured by sulfonation and alkali fusion of naphthalene, obtained from petroleum refining or coal-tar distillation. No natural or bio-based route exists.

In plain English

A synthetic ingredient used in some hair dyes and fragrances, made from petroleum- or coal-tar-derived naphthalene. It has no natural origin.

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Structure

2D structure of 2-Naphthol

naphthalen-2-ol

PubChem CID 8663 ↗

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. 22-Naphthol. PubChem CID 8663. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 32-NAPHTHOL. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 42-NAPHTHOL. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=2-NAPHTHOL