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 |
|---|---|---|---|---|
| Petrochemical citral + butanone | citral built from isobutylene and formaldehyde, condensed with petrochemical butanone, then ring-closed | 0.00 | majority (bulk synthetic citral) | no natural-origin atoms |
| Natural or pine-derived citral + butanone | citral from litsea cubeba or lemongrass oil, or made from pine-turpentine terpenes, condensed with petrochemical butanone | 0.66 | minority | citral part C10H16 136.24 Da natural of 206.33 Da |
How we scored it
How it’s made
Where it comes from
Citral is condensed with butanone and the chain is then closed into a ring by acid. Most bulk citral is built from petrochemical isobutylene and formaldehyde; citral from litsea cubeba or lemongrass oil, or made from pine terpenes, gives the natural-origin route.
In plain English
A fragrance ingredient with a violet, powdery scent. About two-thirds of it is citral, which can come from lemongrass-type oils or pine terpenes or be made from petrochemicals, so its natural-origin score depends on the supplier.
CosIng definition: Alpha-Isomethyl Ionone is the organic compound that conforms to the formula
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Structure
(E)-3-methyl-4-(2,6,6-trimethylcyclohex-2-en-1-yl)but-3-en-2-one
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.
- 2Alpha-Isomethyl Ionone. PubChem CID 5372174. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
- 3ALPHA-ISOMETHYL IONONE. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 4ALPHA-ISOMETHYL IONONE. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=ALPHA-ISOMETHYL%20IONONE