# ISO 2070:1981 — Withdrawn and superseded ISO standards

For ISO 2070:1981, item title is Aluminium oxide primarily used for the production of aluminium — Determination of calcium content — Naphthalhydroxamic acid spectrophotometric method; status code is 9599; successor is ISO 2070:1997; withdrawn / published date is 1981-08-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 2070:1981 _(verified: appears in the quote below)_
- **Item title:** Aluminium oxide primarily used for the production of aluminium — Determination of calcium content — Naphthalhydroxamic acid spectrophotometric method _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 2070:1997
- **Withdrawn / published date:** 1981-08-01 _(verified: appears in the quote below)_

## What the source says

> 6853,IS,,ISO 2070:1981,Aluminium oxide primarily used for the production of aluminium — Determination of calcium content — Naphthalhydroxamic acid spectrophotometric method,Oxyde d'aluminium principalement utilisé pour la production de l'aluminium — Dosage du calcium — Méthode spectrophotométrique à l'acide naphtalhydroxamique,1981-08-01,1,['71.100.10'],ISO/TC 226,9599,,[26265],"['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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).