# ISO 312:1980 — Withdrawn and superseded ISO standards

For ISO 312:1980, item title is Manganese ores — Determination of active oxygen content, expressed as manganese dioxide — Volumetric method; status code is 9599; successor is ISO 312:1986; withdrawn / published date is 1980-05-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 312:1980 _(verified: appears in the quote below)_
- **Item title:** Manganese ores — Determination of active oxygen content, expressed as manganese dioxide — Volumetric method _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 312:1986
- **Withdrawn / published date:** 1980-05-01 _(verified: appears in the quote below)_

## What the source says

> 4251,IS,,ISO 312:1980,"Manganese ores — Determination of active oxygen content, expressed as manganese dioxide — Volumetric method","Minerais de manganèse — Dosage de l'oxygène actif, exprimé en dioxyde de manganèse — Méthode volumétrique",1980-05-01,2,['73.060.20'],ISO/TC 65,9599,,[4252],"['en','fr']",2,

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).