Database/Colorant/CI 45350
100% petroleum · ISO 16128

Is CI 45350 natural?

No. Synthetic xanthene colorant built from petrochemical aromatic feedstocks, resorcinol and phthalic anhydride; no natural fragments.

INCI nameCI 45350
CAS518-47-8
FormulaC20H10Na2O5 · 376.3 Da
FunctionColorant
FeedstockSynthesised by condensing resorcinol with phthalic anhydride, both…

How we scored it

Xanthene dye (fluorescein-type disodium salt) made from resorcinol and phthalic anhydride, both benzene-derived. Whole molecule petrochemical aromatic synthesis.
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 by condensing resorcinol with phthalic anhydride, both derived from petroleum-based benzene, then converting to the disodium salt. No natural production route exists for this synthetic dye.

In plain English

A bright yellow-orange synthetic dye used to colour cosmetic and personal care products. Manufactured from petrochemical aromatic building blocks.

CosIng definition: CI 45350 is classed chemically as a xanthene colour. It conforms to the formula:

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Structure

2D structure of CI 45350

disodium;2-(3-oxido-6-oxoxanthen-9-yl)benzoate

PubChem CID 10608 ↗

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 45350. PubChem CID 10608. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3CI 45350. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4CI 45350. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=CI%2045350