Database/Colorant/CI 50325
Mostly petroleum · ISO 16128

Is CI 50325 natural?

Mostly not. Sodium and sulfonate groups count as mineral/natural; the phenazine dye ring, methoxy and phenyl groups are petrochemical aromatics.

INCI nameCI 50325
CAS6856-08-2
FormulaC29H21N4NaO7S2 · 624.6 Da
FunctionColorant
FeedstockA sulfonated azine (phenazine) dye synthesised from petrochemical…

How we scored it

Na (23) + 2xSO3 (S+3O=80 each, 160) = 183 Da natural; phenazine/methoxy core (441.6 Da) petrochemical. 183/624.6=0.29. Charge balance (1 Na for 2 sulfonates) uncertain.
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 sulfonated azine (phenazine) dye synthesised from petrochemical aromatic amines, isolated as a partial sodium salt. No natural-origin route exists.

In plain English

A synthetic sulfonated azine dye used as a colorant in cosmetics. Built from petrochemical aromatic amines, with sodium and sulfonate groups added during manufacture.

CosIng definition: CI 50325 is classed chemically as an azine colour. It conforms to the formula:

Natural alternatives with the same function

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Structure

2D structure of CI 50325

sodium (11-methoxy-7-phenyl-5-phenylimino-4,8-disulfobenzo[a]phenazin-9-yl)azanide

PubChem CID 101703552 ↗

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 50325. PubChem CID 101703552. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3CI 50325. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4CI 50325. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=CI%2050325