Database/Skin Conditioning/Tropolone
100% petroleum · ISO 16128

Is Tropolone natural?

No. Tropolone occurs in some fungi and cedar-related woods, but cosmetic-grade supply is chemically synthesised from petrochemical precursors.

INCI nameTropolone
CAS533-75-5
FormulaC7H6O2 · 122.12 Da
FunctionSkin Conditioning
FeedstockCommercially made by chemical synthesis (e.g. from cycloheptanone-…

How we scored it

Non-benzenoid aromatic ketone; cosmetic-grade material is chemically synthesised (e.g. ring-expansion routes), not extracted at commercial scale.
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

Commercially made by chemical synthesis (e.g. from cycloheptanone- or guaiacol-type precursors) rather than plant extraction. A minor natural occurrence exists but is not the cosmetic supply route.

In plain English

A small aromatic ingredient used to help condition skin. Related natural versions occur in some fungi and woods, but the cosmetic ingredient is generally made by chemical synthesis.

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Structure

2D structure of Tropolone

2-hydroxycyclohepta-2,4,6-trien-1-one

PubChem CID 10789 ↗

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. 2Tropolone. PubChem CID 10789. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3TROPOLONE. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4TROPOLONE. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=TROPOLONE