Database/Colorant/CI 75170
100% natural origin · ISO 16128

Is CI 75170 natural?

Yes. Guanine is a naturally-occurring purine base, traditionally obtained from fish scales or by extraction; scored as a natural biomolecule.

INCI nameCI 75170
CAS73-40-5
FormulaC5H5N5O · 151.13 Da
FunctionColorant
FeedstockCI 75170 is guanine, traditionally extracted from fish…

How we scored it

Guanine, a naturally-occurring purine (per CosIng: 'a natural purine'); scored as a biological extraction/fermentation product = 1.0
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

CI 75170 is guanine, traditionally extracted from fish scales as pearl essence, a natural biomolecule. A chemically synthesised alternative also exists commercially.

In plain English

A natural pearlescent pigment, guanine, that gives products a shimmery look. It is traditionally obtained from fish scales, though a synthetic version also exists.

CosIng definition: CI 75170 is a natural purine that conforms to the formula:

Structure

2D structure of CI 75170

2-amino-1,7-dihydropurin-6-one

PubChem CID 135398634 ↗

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 75170. PubChem CID 135398634. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3CI 75170. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4CI 75170. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=CI%2075170