# ISO 21068-3:2008 — Withdrawn and superseded ISO standards

For ISO 21068-3:2008, item title is Chemical analysis of silicon-carbide-containing raw materials and refractory products — Part 3: Determination of nitrogen, oxygen and metallic and oxidic constituents; status code is 9599; successor is ISO 21068-3:2024; withdrawn / published date is 2008-07-21, recorded from its source on 2026-08-05.

- **Identifier:** ISO 21068-3:2008 _(verified: appears in the quote below)_
- **Item title:** Chemical analysis of silicon-carbide-containing raw materials and refractory products — Part 3: Determination of nitrogen, oxygen and metallic and oxidic constituents _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 21068-3:2024
- **Withdrawn / published date:** 2008-07-21 _(verified: appears in the quote below)_

## What the source says

> 43831,IS,,ISO 21068-3:2008,"Chemical analysis of silicon-carbide-containing raw materials and refractory products — Part 3: Determination of nitrogen, oxygen and metallic and oxidic constituents","Analyse chimique des matières premières et des produits réfractaires contenant du carbure de silicium — Partie 3: Dosage de l'azote, de l'oxygène et des constituants métalliques et oxydés",2008-07-21,1,['81.080'],ISO/TC 33,9599,,[83509],"['en','fr']",37,"<p>ISO 21068-3:2008 specifies methods for the determination of total nitrogen and nitrogen calculated as silicon nitride, total oxygen, and free metallic and oxidic components in silicon carbide raw materials and refractory products. </p><p>It appl

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).