Database/Colorant/Acid Red 14
Mostly petroleum · ISO 16128

Is Acid Red 14 natural?

Mostly not. Two sulfonate/sodium groups count as natural mineral content; the azo-linked naphthalene dye backbone is petrochemical aromatic chemistry.

INCI nameAcid Red 14
CAS3567-69-9
FormulaC20H12N2Na2O7S2 · 502.4 Da
FunctionColorant
FeedstockA synthetic monoazo naphthalene-sulfonate colorant (CI 14720); the…

How we scored it

2x SO3Na (natural, mineral sulfonate, ~206 Da) + naphthalene-azo-naphthol dye body (petrochemical aromatic, ~296 Da); 206/502 = 0.41.
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 monoazo naphthalene-sulfonate colorant (CI 14720); the dye backbone is made from petrochemical naphthalene and aniline intermediates. The two sodium sulfonate groups are counted as natural mineral content.

In plain English

A red colorant (CI 14720) used in cosmetics. Most of the molecule is a synthetic petroleum-based azo dye, with two small natural mineral (sodium sulfonate) portions.

CosIng definition: Acid Red 14 is classed chemically as a monoazo color. It conforms to the formula. To identify the colorant allowed for use in the European Union (EU), the INCI Name CI 14720 must be used, except for hair dye products.

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Structure

2D structure of Acid Red 14

disodium;4-hydroxy-3-[(4-sulfonatonaphthalen-1-yl)diazenyl]naphthalene-1-sulfonate

PubChem CID 19118 ↗

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 Red 14. PubChem CID 19118. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3ACID RED 14. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4ACID RED 14. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=ACID%20RED%2014