# ISO 20843:2003 — Withdrawn and superseded ISO standards

For ISO 20843:2003, item title is Petroleum and related products — Determination of pH of fire-resistant fluids within categories HFAE, HFAS and HFC; status code is 9599; successor is ISO 20843:2011; withdrawn / published date is 2003-08-22, recorded from its source on 2026-08-05.

- **Identifier:** ISO 20843:2003 _(verified: appears in the quote below)_
- **Item title:** Petroleum and related products — Determination of pH of fire-resistant fluids within categories HFAE, HFAS and HFC _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 20843:2011
- **Withdrawn / published date:** 2003-08-22 _(verified: appears in the quote below)_

## What the source says

> 34280,IS,,ISO 20843:2003,"Petroleum and related products — Determination of pH of fire-resistant fluids within categories HFAE, HFAS and HFC","Pétrole et produits connexes — Détermination du pH des fluides difficilement inflammables de catégories HFAE, HFAS ou HFC",2003-08-22,1,['75.120'],ISO/TC 28,9599,,[56539],"['en','fr']",3,"<p>ISO 20843:2003 specifies a test method to determine the pH value of non-flammable fluids within categories HFAE, HFAS and HFC, as classified in ISO 6743-4:1999.</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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).