Database/Colorant/CI 45425
Mostly petroleum · ISO 16128

Is CI 45425 natural?

Mostly not. Sodium is mineral-derived; the iodinated xanthene chromophore is built from petrochemical resorcinol and phthalic anhydride.

INCI nameCI 45425
CAS33239-19-9
FormulaC20H8I2Na2O5 · 628.1 Da
FunctionColorant
FeedstockSynthesised from petrochemical resorcinol and phthalic anhydride to…

How we scored it

Na2(46) natural (mineral); iodinated xanthene core C20H8I2O5 petrochemical, iodine not a listed natural fragment; 46/628=0.07.
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

Synthesised from petrochemical resorcinol and phthalic anhydride to form the xanthene dye core, then iodinated and isolated as the disodium salt. No natural route exists.

In plain English

A synthetic iodine-containing pink-red dye. Its core structure comes from petrochemical feedstocks; only the sodium portion is mineral-derived.

CosIng definition: CI 45425 is classed chemically as a xanthene color. It conforms to the formula.

Natural alternatives with the same function

Aluminum Powder 100% natural origin

Finely powdered aluminum metal used to add shimmer or color to cosmetics. It comes from refining bauxite ore,…

 Aluminum Stearate 100% natural origin

An aluminium salt of stearic acid, a fatty acid from vegetable or animal fat. Used to prevent caking,…

 Anthocyanins 100% natural origin

A natural colorant that gives products red, purple or blue tones. It is recovered from grape skins or…

 Calcium Ferrite 100% natural origin

A mineral pigment made of calcium and iron oxide, used as a colourant in cosmetics. It is produced…

 Calcium Stearate 100% natural origin

The calcium salt of stearic acid, a fatty acid usually from vegetable oils. Used as an anti-caking, thickening…

 Caramel 100% natural origin

A colouring and fragrance ingredient made by heating sugar, sucrose or glucose, until it browns. It comes from…

Structure

2D structure of CI 45425

disodium;4',5'-diiodo-3-oxospiro[2-benzofuran-1,9'-xanthene]-3',6'-diolate

PubChem CID 161764 ↗

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 45425. PubChem CID 161764. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3CI 45425. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4CI 45425. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=CI%2045425