Is Disperse Yellow 3 natural? NOI 0.00

Q: Is Disperse Yellow 3 natural?

Disperse Yellow 3 has a Natural Origin Index (NOI) of 0.00 (scale 0–1) per ISO 16128. Made from petrochemical toluidine and cresol derivatives via diazo coupling; no natural fragment exists. An NOI of 0.00 means 0% of its molecular mass is traceable to a natural, renewable source.

How we scored it

Acetamido-hydroxy-azo-toluene dye C15H15N3O2; entirely synthetic aromatic molecule, no mineral fragment; 0/269=0.00.

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 diazotising an acetamido-toluidine and coupling with a cresol, both petrochemical aromatics. No natural route exists.

In plain English

A synthetic yellow dye used in hair colourants, made from petroleum-derived aromatic chemicals.

Structure

N-[4-[(2-hydroxy-5-methylphenyl)diazenyl]phenyl]acetamide

PubChem CID 17811 ↗

References

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.
2Disperse Yellow 3. PubChem CID 17811. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
3DISPERSE YELLOW 3. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
4Disperse Yellow 3. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=Disperse%20Yellow%203