Database/Colorant/CI 28440
Mostly petroleum · ISO 16128

Is CI 28440 natural?

Mostly not. Tetrasulfonated disazo dye from petrochemical naphthalene/aniline intermediates plus an acetamido (acetic-anhydride derived) cap; sulfonate/sodium groups counted mineral.

INCI nameCI 28440
CAS2519-30-4
FormulaC28H17N5Na4O14S4 · 867.7 Da
FunctionColorant
FeedstockA tetrasodium disazo naphthalene sulfonate dye built by…

How we scored it

MW 867.7: 4xSO3Na=4x103.06=412.24 mineral-natural; remaining acetamido-naphthalene-disazo backbone 455.46 petrochemical (incl. petrochemical acetyl cap) -> 412.24/867.7=0.48.
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 tetrasodium disazo naphthalene sulfonate dye built by double diazotisation/coupling of petrochemical sulfonated aromatic amines. No natural production route; nearly half the mass is mineral sulfonate/sodium.

In plain English

A synthetic disazo colorant used in cosmetics, built from petrochemical naphthalene and aniline chemicals carrying four sulfonate salt groups. A man-made dye despite its substantial mineral salt content.

CosIng definition: CI 28440 is classed chemically as a disazo colour. It conforms to the formula:

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Structure

2D structure of CI 28440

tetrasodium;4-acetamido-5-hydroxy-6-[[7-sulfonato-4-[(4-sulfonatophenyl)diazenyl]naphthalen-1-yl]diazenyl]naphthalene-1,7-disulfonate

PubChem CID 17293 ↗

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. 2CI 28440. PubChem CID 17293. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3CI 28440. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4CI 28440. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=CI%2028440