Database/Perfuming/Hydroxycitronellal Dimethyl Acetal
Mostly natural · ISO 16128

Is Hydroxycitronellal Dimethyl Acetal natural?

Mostly. Terpene backbone assumed from turpentine-derived citronellal (natural); two methoxy groups from methanol (petrochemical).

INCI nameHydroxycitronellal Dimethyl Acetal
CAS141-92-4
FormulaC12H26O3 · 218.33 Da
FunctionPerfuming
FeedstockMade by hydrating citronellal (commonly from turpentine-derived beta-pinene/myrcene)…

How we scored it

Hydroxycitronellal skeleton retained minus aldehyde O (156/218 Da, from turpentine-derived myrcene/citronellal) + 2x OCH3 from methanol (62/218 Da, petrochemical) = 156/218 = 0.72.
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

Made by hydrating citronellal (commonly from turpentine-derived beta-pinene/myrcene) to hydroxycitronellal, then reacting with methanol to form the acetal. An alternative fully petrochemical myrcene route also exists; dominant supply route is uncertain.

In plain English

A synthetic fragrance ingredient, an acetal form of hydroxycitronellal made using methanol, used to add a floral, lily-of-the-valley type scent to perfumed products.

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Structure

2D structure of Hydroxycitronellal Dimethyl Acetal

8,8-dimethoxy-2,6-dimethyloctan-2-ol

PubChem CID 8863 ↗

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. 2Hydroxycitronellal Dimethyl Acetal. PubChem CID 8863. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3HYDROXYCITRONELLAL DIMETHYL ACETAL. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4HYDROXYCITRONELLAL DIMETHYL ACETAL. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=HYDROXYCITRONELLAL%20DIMETHYL%20ACETAL