# ISO 279:1981 — Withdrawn and superseded ISO standards

For ISO 279:1981, item title is Essential oils — Determination of relative density at 20 degrees C (Reference method); status code is 9599; successor is ISO 279:1998; withdrawn / published date is 1981-04-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 279:1981 _(verified: appears in the quote below)_
- **Item title:** Essential oils — Determination of relative density at 20 degrees C (Reference method) _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 279:1998
- **Withdrawn / published date:** 1981-04-01 _(verified: appears in the quote below)_

## What the source says

> 4191,IS,,ISO 279:1981,Essential oils — Determination of relative density at 20 degrees C (Reference method),Huiles essentielles — Détermination de la densité relative à 20 degrés C (Méthode de référence),1981-04-01,1,['71.100.60'],ISO/TC 54,9599,,[25308],"['en','fr']",2,

## Source

- https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv

Last verified: 2026-08-05. Review by: 2027-02-01.
Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).