Database/Hair Dyeing/1-Naphthol
100% petroleum · ISO 16128

Is 1-Naphthol natural?

No. Derived from naphthalene, a fossil (coal-tar or petroleum) aromatic hydrocarbon, with no natural-origin fragment.

INCI name1-Naphthol
CAS90-15-3
FormulaC10H8O · 144.17 Da
FunctionHair Dyeing
FeedstockManufactured from naphthalene, obtained from coal tar or…

How we scored it

Naphthalene-derived aromatic, coal-tar/petroleum feedstock, analogous to phenol-class = 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 from naphthalene, obtained from coal tar or petroleum refining, via hydroxylation. No natural-origin feedstock is used.

In plain English

A compound derived from naphthalene, a coal-tar and petroleum-based aromatic chemical. Used as a color-forming ingredient in permanent hair dye formulas.

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Structure

2D structure of 1-Naphthol

naphthalen-1-ol

PubChem CID 7005 ↗

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. 21-Naphthol. PubChem CID 7005. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 31-NAPHTHOL. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 41-NAPHTHOL. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=1-NAPHTHOL