# ISO 9022-20:1997 — Withdrawn and superseded ISO standards

For ISO 9022-20:1997, item title is Optics and optical instruments — Environmental test methods — Part 20: Humid atmosphere containing sulfur dioxide or hydrogen sulfide; status code is 9599; successor is ISO 9022-20:2015; withdrawn / published date is 1997-06-19, recorded from its source on 2026-08-05.

- **Identifier:** ISO 9022-20:1997 _(verified: appears in the quote below)_
- **Item title:** Optics and optical instruments — Environmental test methods — Part 20: Humid atmosphere containing sulfur dioxide or hydrogen sulfide _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 9022-20:2015
- **Withdrawn / published date:** 1997-06-19 _(verified: appears in the quote below)_

## What the source says

> 22462,IS,,ISO 9022-20:1997,Optics and optical instruments — Environmental test methods — Part 20: Humid atmosphere containing sulfur dioxide or hydrogen sulfide,Optique et instruments d'optique — Méthodes d'essais d'environnement — Partie 20: Atmosphère humide contenant du dioxyde de soufre ou de l'hydrogène sulfuré,1997-06-19,1,['37.020'],ISO/TC 172/SC 1,9599,,[66491],"['en','fr']",6,

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).