# ISO 247:1990 — Withdrawn and superseded ISO standards

For ISO 247:1990, item title is Rubber — Determination of ash; status code is 9599; successor is ISO 247:2006; withdrawn / published date is 1990-11-08, recorded from its source on 2026-08-05.

- **Identifier:** ISO 247:1990 _(verified: appears in the quote below)_
- **Item title:** Rubber — Determination of ash _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 247:2006
- **Withdrawn / published date:** 1990-11-08 _(verified: appears in the quote below)_

## What the source says

> 4139,IS,,ISO 247:1990,Rubber — Determination of ash,Caoutchouc — Détermination du taux de cendres,1990-11-08,3,['83.060'],ISO/TC 45/SC 2,9599,[4138],[43677],"['en','fr']",3,"<p>The two methods are applicable to raw, compounded and vulcanized rubbers of the families described in ISO 1629. The principle of method A consists in heating a weighed test portion in a crucible over a gas burner, followed by volatilization of the decomposition products and transfer of the crucible to a muffle furnace. The crucible is heated until all the carbonaceous matter has been burnt off and constant mass is attained. In method B a weighed test portion is heated in a crucible in the presence of sulfuric acid, fi

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).