# ISO 20136:2017 — Withdrawn and superseded ISO standards

For ISO 20136:2017, item title is Leather — Determination of degradability by micro-organisms; status code is 9599; successor is ISO 20136:2020; withdrawn / published date is 2017-03-02, recorded from its source on 2026-08-05.

- **Identifier:** ISO 20136:2017 _(verified: appears in the quote below)_
- **Item title:** Leather — Determination of degradability by micro-organisms _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 20136:2020
- **Withdrawn / published date:** 2017-03-02 _(verified: appears in the quote below)_

## What the source says

> 67094,IS,,ISO 20136:2017,Leather — Determination of degradability by micro-organisms,Cuir — Détermination de la dégradabilité par les micro-organismes,2017-03-02,1,['59.140.30'],IULTCS,9599,,[75892],"['en','fr']",20,"<p>ISO 20136:2017 specifies a test method to determine the degree and rate of aerobic biodegradation of hides and skins of different animal origin, whether they are tanned or not, through the indirect determination of CO<sub>2</sub> produced by the degradation of collagen.</p><p>The test material is exposed to an inoculum (activated sludge from tannery wastewater) in an aqueous medium.</p><p>The conditions established in this document correspond to optimum laboratory conditions

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).