# ISO 806:1976 — Withdrawn and superseded ISO standards

For ISO 806:1976, item title is Aluminium oxide primarily used for the production of aluminium — Determination of loss of mass at 1 000 degrees C and 1 200 degrees C; status code is 9599; successor is ISO 806:2004; withdrawn / published date is 1976-09-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 806:1976 _(verified: appears in the quote below)_
- **Item title:** Aluminium oxide primarily used for the production of aluminium — Determination of loss of mass at 1 000 degrees C and 1 200 degrees C _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 806:2004
- **Withdrawn / published date:** 1976-09-01 _(verified: appears in the quote below)_

## What the source says

> 5151,IS,,ISO 806:1976,Aluminium oxide primarily used for the production of aluminium — Determination of loss of mass at 1 000 degrees C and 1 200 degrees C,Oxyde d'aluminium principalement utilisé pour la production de l'aluminium — Détermination de la perte de masse à 1 000 degrés C et à 1 200 degrés C,1976-09-01,1,['71.100.10'],ISO/TC 226,9599,,[36360],"['en','fr']",3,"<p>The temperatures are arbitrarily selected and specified because there is no specific calcination temperature. There is no criterion for the state of calcination. Therefore, ignition of two test portions taken from the same sample and previously dried in a muffle furnace for 2 h. Calculation by difference in mass. Replaces

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).