# ISO 2174:1979 — Withdrawn and superseded ISO standards

For ISO 2174:1979, item title is Surface active agents — Preparation of water with known calcium hardness; status code is 9599; successor is ISO 2174:1990; withdrawn / published date is 1979-11-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 2174:1979 _(verified: appears in the quote below)_
- **Item title:** Surface active agents — Preparation of water with known calcium hardness _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 2174:1990
- **Withdrawn / published date:** 1979-11-01 _(verified: appears in the quote below)_

## What the source says

> 6971,IS,,ISO 2174:1979,Surface active agents — Preparation of water with known calcium hardness,Agents de surface — Préparation d'une eau de dureté calcique déterminée,1979-11-01,2,['71.100.40'],ISO/TC 91,9599,,[6972],"['en','fr']",3,

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).