Database/Fragrance/Ethyl Trimethylcyclopentene Butenol
Mostly natural · ISO 16128

Is Ethyl Trimethylcyclopentene Butenol natural?

Mostly. Campholenic aldehyde from pine alpha-pinene supplies ten natural-origin terpene carbons, while the condensed butanal-derived four-carbon unit is petrochemical oxo chemistry.

INCI nameEthyl Trimethylcyclopentene Butenol
CAS28219-61-6
FunctionFragrance · Perfuming
FeedstockPine alpha-pinene is epoxidised and rearranged to campholenic…

How we scored it

Campholenyl skeleton C10H16 136 Da (pine alpha-pinene) natural; =C(Et)CH2OH unit C4H8O 72 Da (butanal, petrochemical); 136.2 / 208.3 = 0.65.
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

Pine alpha-pinene is epoxidised and rearranged to campholenic aldehyde, condensed with butanal and selectively reduced to the allylic alcohol. Butanal is made from propylene; the route is assumed from the structure.

In plain English

A synthetic fragrance ingredient with a warm, creamy sandalwood scent (known as Bacdanol), used in perfumes and scented products. It is built from a pine-derived terpene aldehyde combined with a petrochemical four-carbon building block.

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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. 2ETHYL TRIMETHYLCYCLOPENTENE BUTENOL. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  3. 3ETHYL TRIMETHYLCYCLOPENTENE BUTENOL. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=ETHYL%20TRIMETHYLCYCLOPENTENE%20BUTENOL