# ISO 6556:1981 — Withdrawn and superseded ISO standards

For ISO 6556:1981, item title is Laboratory glassware — Filter flasks; status code is 9599; successor is ISO 6556:2012; withdrawn / published date is 1981-07-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 6556:1981 _(verified: appears in the quote below)_
- **Item title:** Laboratory glassware — Filter flasks _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 6556:2012
- **Withdrawn / published date:** 1981-07-01 _(verified: appears in the quote below)_

## What the source says

> 12955,IS,,ISO 6556:1981,Laboratory glassware — Filter flasks,Verrerie de laboratoire — Fioles à filtrer,1981-07-01,1,['71.040.20'],ISO/TC 48,9599,,[56903],"['en','fr']",5,"<p>The requirements specify a series of capacities from 100 ml to 2000 ml. The construction with material, shape, radius of curvature of base and the vacuum connection are illustrated. The dimensions are tabled and the most important sections of the flask are drawn. The annex specify hydraulic external pressure tests.</p>"

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).