Decanal has a Natural Origin Index (NOI) of 1.00 (scale 0–1) per ISO 16128. Present naturally in citrus peel oils and commonly made by oxidising coconut/palm-kernel-derived decanol — both routes are natural-origin feedstock. An NOI of 1.00 means 100% of its molecular mass is traceable to a natural, renewable source.

Is Decanal natural? NOI 1.00 — Is That Natural?

How we scored it

C10 fatty aldehyde; treated like the C8-C22 fatty-alcohol convention (assume oleochemical origin for cosmetic/fragrance grade) or isolated directly from citrus peel oil; supplier note for a minor petrochemical (Ziegler) alternative.

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

Cosmetic/fragrance-grade material is typically isolated from citrus peel oil or made by oxidising oleochemical (coconut/palm-kernel) decanol. A minor petrochemical (Ziegler-alcohol) route also exists as a supplier alternative.

In plain English

A citrus-scented fragrance ingredient naturally found in orange and lemon peel oil. Typically made from coconut or palm-kernel-derived fatty alcohol, or isolated directly from citrus oil.

Structure

decanal

PubChem CID 8175 ↗

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.
2Decanal. PubChem CID 8175. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
3DECANAL. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
4DECANAL. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=DECANAL