Database/Hair Dyeing/Basic Green 1
Mostly petroleum · ISO 16128

Is Basic Green 1 natural?

Mostly not. Synthetic diethylamino-triarylmethane dye cation from petrochemical aromatic amines; only the bisulfate counter-ion is mineral-derived.

INCI nameBasic Green 1
CAS633-03-4
FormulaC27H34N2O4S · 482.6 Da
FunctionHair Dyeing
FeedstockManufactured by condensation of synthetic aromatic amines to…

How we scored it

Cation C27H33N2 (~386 Da, synthetic triarylmethane dye) + hydrogen sulfate counter-ion HSO4 (97 Da, mineral, natural) → 97/482.6 = 0.20.
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 condensation of synthetic aromatic amines to build the triarylmethane chromophore, isolated as the hydrogen sulfate salt. No natural-origin route exists for the dye core.

In plain English

A synthetic dye used to colour hair. It is manufactured from petrochemical aromatic compounds; only its sulfate counter-ion comes from a mineral source.

Natural alternatives with the same function

Structure

2D structure of Basic Green 1

[4-[[4-(diethylamino)phenyl]-phenylmethylidene]cyclohexa-2,5-dien-1-ylidene]-diethylazanium;hydrogen sulfate

PubChem CID 12449 ↗

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. 2Basic Green 1. PubChem CID 12449. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3BASIC GREEN 1. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4BASIC GREEN 1. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=BASIC%20GREEN%201