# ISO 4045:1977 — Withdrawn and superseded ISO standards

For ISO 4045:1977, item title is Leather — Determination of pH; status code is 9599; successor is ISO 4045:2008; withdrawn / published date is 1977-09-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 4045:1977 _(verified: appears in the quote below)_
- **Item title:** Leather — Determination of pH _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 4045:2008
- **Withdrawn / published date:** 1977-09-01 _(verified: appears in the quote below)_

## What the source says

> 9747,IS,,ISO 4045:1977,Leather — Determination of pH,Cuir — Détermination du pH,1977-09-01,1,['59.140.30'],IULTCS,9599,,[43410],"['en','fr']",2,"<p>The principle consists in preparation of an aqueous extract from a test portion of the leather, and measurement of the pH of the extract, using a pH meter. The definition of a difference figure of an aqueous leather extract is given. Reagents, apparatus, procedure and the test report are specified.</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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).