# ISO 420:1976 — Withdrawn and superseded ISO standards

For ISO 420:1976, item title is Photographic grade potassium bromide — Specification; status code is 9599; successor is ISO 420:1994; withdrawn / published date is 1976-07-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 420:1976 _(verified: appears in the quote below)_
- **Item title:** Photographic grade potassium bromide — Specification _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 420:1994
- **Withdrawn / published date:** 1976-07-01 _(verified: appears in the quote below)_

## What the source says

> 4428,IS,,ISO 420:1976,Photographic grade potassium bromide — Specification,Bromure de potassium de qualité photographique — Spécifications,1976-07-01,1,['37.040.30'],ISO/TC 42,9599,,[20280],"['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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).