Why the score varies
This ingredient is made commercially by more than one route, and ISO 16128 scores the feedstock actually used. Without a supplier certificate of origin the value cannot be claimed.
| Route | Feedstock | NOI | Share | Notes |
|---|---|---|---|---|
| Natural or pine-derived citronellal, hydrated | citronellal from citronella oil or made from pine-turpentine myrcene, plus water | 1.00 | significant, share unclear | |
| Citronellal from petrochemical citral, hydrated | citronellal hydrogenated from citral built from isobutylene and formaldehyde, plus water | 0.00 | significant, share unclear |
Ask your supplier. A batch-specific certificate of origin or bio-based carbon test (ASTM D6866) settles which route applies.
How we scored it
Citronellal C10H18O 154.25 Da + water 18.02 Da (natural) = 172.27 Da. Natural or pine-derived citronellal: 1.00; citronellal from isobutylene-based citral: 0.00. Routes not averaged.
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, usually protected as its enamine or bisulfite adduct during the step. The citronellal comes from citronella oil, from pine turpentine via myrcene, or from petrochemical citral; the first two give the natural-origin route.
In plain English
A fragrance ingredient with a sweet, lily-of-the-valley scent. It is made from citronellal, which can come from citronella oil or pine terpenes or be made from petrochemicals, so its natural-origin score depends on the supplier.
Structure
7-hydroxy-3,7-dimethyloctanal
References
- 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.
- 2Hydroxycitronellal. PubChem CID 7888. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
- 3HYDROXYCITRONELLAL. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 4Hydroxycitronellal. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=Hydroxycitronellal