# ISO 418:1994 — Withdrawn and superseded ISO standards

For ISO 418:1994, item title is Photography — Processing chemicals — Specifications for anhydrous sodium sulfite; status code is 9599; successor is ISO 418:2001; withdrawn / published date is 1994-04-21, recorded from its source on 2026-08-05.

- **Identifier:** ISO 418:1994 _(verified: appears in the quote below)_
- **Item title:** Photography — Processing chemicals — Specifications for anhydrous sodium sulfite _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 418:2001
- **Withdrawn / published date:** 1994-04-21 _(verified: appears in the quote below)_

## What the source says

> 20285,IS,,ISO 418:1994,Photography — Processing chemicals — Specifications for anhydrous sodium sulfite,Photographie — Produits chimiques de traitement — Spécifications relatives au sulfite de sodium anhydre,1994-04-21,2,['37.040.30'],ISO/TC 42,9599,[4426],[33087],"['en','fr']",5,"<p>Establishes criteria for the purity and describes the test methods for insoluble matter content, heavy metals content, iron content, alkalinity, reaction to ammoniacal silver nitrate, thiosulfate, appearance of 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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).