# ISO 743:1976 — Withdrawn and superseded ISO standards

For ISO 743:1976, item title is Sodium carbonate for industrial use — Determination of sulphate content — Barium sulphate gravimetric method; status code is 9599; successor is ISO/CD 743; withdrawn / published date is 1976-02-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 743:1976 _(verified: appears in the quote below)_
- **Item title:** Sodium carbonate for industrial use — Determination of sulphate content — Barium sulphate gravimetric method _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO/CD 743
- **Withdrawn / published date:** 1976-02-01 _(verified: appears in the quote below)_

## What the source says

> 4995,IS,,ISO 743:1976,Sodium carbonate for industrial use — Determination of sulphate content — Barium sulphate gravimetric method,Carbonate de sodium à usage industriel — Dosage des sulfates — Méthode gravimétrique à l'état de sulfate de baryum,1976-02-01,1,['71.060.50'],ISO/TC 47,9599,,[4996],"['en','fr']",3,"<p>The principle in dissolution of a test portion and separation of the insoluble matter. Precipitation of sulphate as barium sulphate in dilute hydrochloric acid medium. Separation of the precipitate obtained and ignition at 800 °C +- 25 °C and weighing. The method is applicable to products having a sodium sulphate content equal to or greater than 0,01 % (m/m). Replaces ISO Recommend

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).