Database/Hair Dyeing/Acid Orange 3
Mostly petroleum · ISO 16128

Is Acid Orange 3 natural?

Mostly not. The sulfonate/sodium group counts as natural mineral content; the dinitroaniline/aniline dye backbone is petrochemical aromatic chemistry.

INCI nameAcid Orange 3
CAS6373-74-6
FormulaC18H13N4NaO7S · 452.4 Da
FunctionHair Dyeing
FeedstockA synthetic nitro-aniline sulfonate dye; the aromatic dye…

How we scored it

SO3Na (natural, mineral sulfonate, ~103 Da) + anilino-dinitroanilino-benzene dye body (petrochemical aromatic amine, ~349 Da); 103/452 = 0.23.
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

A synthetic nitro-aniline sulfonate dye; the aromatic dye body is made from petrochemical aniline and nitrobenzene intermediates. The sodium sulfonate salt group is counted as natural mineral content per ISO convention.

In plain English

An orange dye used to colour hair. Most of the molecule is a synthetic petroleum-based dye, with a small natural mineral (sodium sulfonate) portion.

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Structure

2D structure of Acid Orange 3

sodium 2-anilino-5-(2,4-dinitroanilino)benzenesulfonate

PubChem CID 5284435 ↗

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. 2Acid Orange 3. PubChem CID 5284435. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3ACID ORANGE 3. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4ACID ORANGE 3. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=ACID%20ORANGE%203