Database/Hair Dyeing/1,5-Naphthalenediol
100% petroleum · ISO 16128

Is 1,5-Naphthalenediol natural?

No. Made by oxidation/hydrolysis of petrochemical naphthalene; no natural source exists.

INCI name1,5-Naphthalenediol
CAS83-56-7
FormulaC10H8O2 · 160.17 Da
FunctionHair Dyeing
FeedstockManufactured from petroleum- or coal-tar-derived naphthalene via industrial…

How we scored it

Naphthalenediol from petrochemical naphthalene -> 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 petroleum- or coal-tar-derived naphthalene via industrial oxidation. Used as a hair-dye coupler with no natural alternative.

In plain English

A synthetic hair-dye ingredient made from petroleum-derived naphthalene, used to help develop colour in permanent dyes.

CosIng definition: 1,5-Naphthalenediol is the bicyclic phenol that conforms to the formula

Natural alternatives with the same function

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 Lawsonia Inermis Extract 100% natural origin

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 Pyrogallol 100% natural origin

A hair-dye ingredient traditionally made by heating gallic acid, itself extracted from plant tannins in gallnuts, until it…

Structure

2D structure of 1,5-Naphthalenediol

naphthalene-1,5-diol

PubChem CID 6749 ↗

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. 21,5-Naphthalenediol. PubChem CID 6749. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 31,5-NAPHTHALENEDIOL. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 41,5-NAPHTHALENEDIOL. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=1%2C5-NAPHTHALENEDIOL