# ISO 3657:1988 — Withdrawn and superseded ISO standards

For ISO 3657:1988, item title is Animal and vegetable fats and oils — Determination of saponification value; status code is 9599; successor is ISO 3657:2002; withdrawn / published date is 1988-12-29, recorded from its source on 2026-08-05.

- **Identifier:** ISO 3657:1988 _(verified: appears in the quote below)_
- **Item title:** Animal and vegetable fats and oils — Determination of saponification value _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 3657:2002
- **Withdrawn / published date:** 1988-12-29 _(verified: appears in the quote below)_

## What the source says

> 9108,IS,,ISO 3657:1988,Animal and vegetable fats and oils — Determination of saponification value,Corps gras d'origines animale et végétale — Détermination de l'indice de saponification,1988-12-29,2,['67.200.10'],ISO/TC 34/SC 11,9599,[9107],[34900],"['en','fr']",2,"<p>The second edition cancels and replaces the first edition (ISO 3657:1977), of which it constitutes a technical revision. The method consists in boiling of a sample under reflux with ethanolic potassium hydroxide solution, followed by titration of the excess potassium hydroxide with standard volumetric hydrochloric acid solution.</p>"

## 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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).