# ISO/R 311:1963 — Withdrawn and superseded ISO standards

For ISO/R 311:1963, item title is Methods of chemical analysis of manganese ores — Determination of silicon dioxide; status code is 9599; successor is ISO 5890:1981; withdrawn / published date is 1963-07-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO/R 311:1963 _(verified: appears in the quote below)_
- **Item title:** Methods of chemical analysis of manganese ores — Determination of silicon dioxide _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 5890:1981
- **Withdrawn / published date:** 1963-07-01 _(verified: appears in the quote below)_

## What the source says

> 4250,R,,ISO/R 311:1963,Methods of chemical analysis of manganese ores — Determination of silicon dioxide,Méthodes d'analyse chimique des minerais de manganèse — Détermination de la silice (bioxyde de silicium),1963-07-01,1,['73.060.20'],ISO/TC 65,9599,,[12089],"['en','fr']",4,

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).