Database/Colorant/CI 42100
Mostly petroleum · ISO 16128

Is CI 42100 natural?

Mostly not. Triphenylmethane dye with a covalently chlorinated phenyl ring (petrochemical, not a mineral counter-ion); sulfonate groups counted as natural mineral fragments.

INCI nameCI 42100
CAS4857-81-2
FormulaC37H34ClN2NaO6S2 · 725.2 Da
FunctionColorant
FeedstockA synthetic triphenylmethane dye built from petrochemical aromatic…

How we scored it

MW 725.2, O6S2/1Na: 1x SO3Na (natural, 103 Da) + 1x additional sulfonate (natural, ~80 Da) ≈ 183/725.2 ≈ 0.25; chlorophenyl + triphenylmethane core covalent/petrochemical
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 triphenylmethane dye built from petrochemical aromatic amines including a chlorinated aniline, sulfonated and isolated as the sodium salt. No natural-extraction route exists.

In plain English

A synthetic blue-violet triphenylmethane dye used to colour cosmetics, built from coal-tar-type aromatic chemicals including a chlorinated phenyl group. Only its sodium sulfonate portion is mineral-derived.

CosIng definition: CI 42100 is classed chemically as a triphenylmethane colour. It conforms to the formula:

Natural alternatives with the same function

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 Calcium Stearate 100% natural origin

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Structure

2D structure of CI 42100

sodium 3-[[4-[(2-chlorophenyl)-[4-[ethyl-[(3-sulfonatophenyl)methyl]azaniumylidene]cyclohexa-2,5-dien-1-ylidene]methyl]-N-ethylanilino]methyl]benzenesulfonate

PubChem CID 25021982 ↗

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 42100. PubChem CID 25021982. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3CI 42100. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4CI 42100. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=CI%2042100