Database/Colorant/Pigment Red 64:1
Mostly petroleum · ISO 16128

Is Pigment Red 64:1 natural?

Mostly not. The azo ligand is built from petrochemical aniline and 3-hydroxy-2-naphthoic acid, while the calcium counter-ion is a mineral.

INCI namePigment Red 64:1
CAS6371-76-2
FormulaC34H22CaN4O6 · 622.6 Da
FunctionColorant
FeedstockAniline is diazotised, coupled to 3-hydroxy-2-naphthoic acid and…

How we scored it

C34H22CaN4O6 = 622.6 Da. Ca 40.1 natural counter-ion; organic azo-naphthoate ligand 582.5 petrochemical (aniline, naphthol). 40.1/622.6 = 0.064.
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

Aniline is diazotised, coupled to 3-hydroxy-2-naphthoic acid and precipitated as the calcium salt. Only the mineral calcium is natural origin and no natural route for the organic part exists.

In plain English

A red synthetic organic pigment (a calcium salt of an azo dye) used to colour products. It is made from petrochemical aromatic chemicals, aniline and a naphthol carboxylic acid, and precipitated with calcium, the only mineral part.

CosIng definition: Pigment Red 64:1 is classed chemically as a monoazo color. It conforms to the formula

Natural alternatives with the same function

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Structure

2D structure of Pigment Red 64:1

calcium bis(3-carboxy-1-phenyldiazenylnaphthalen-2-olate)

PubChem CID 135565537 ↗

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. 2Pigment Red 64:1. PubChem CID 135565537. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3PIGMENT RED 64:1. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4PIGMENT RED 64:1. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=PIGMENT%20RED%2064%3A1