# ISO 5143:1977 — Withdrawn and superseded ISO standards

For ISO 5143:1977, item title is Sodium carbonate for industrial use — Determination of sulphur compounds content — Method by reduction and titrimetry; status code is 9599; successor is ISO/CD 5143; withdrawn / published date is 1977-11-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 5143:1977 _(verified: appears in the quote below)_
- **Item title:** Sodium carbonate for industrial use — Determination of sulphur compounds content — Method by reduction and titrimetry _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO/CD 5143
- **Withdrawn / published date:** 1977-11-01 _(verified: appears in the quote below)_

## What the source says

> 11151,IS,,ISO 5143:1977,Sodium carbonate for industrial use — Determination of sulphur compounds content — Method by reduction and titrimetry,Carbonate de sodium à usage industriel — Dosage des composés soufrés — Méthode par réduction et titrimétrie,1977-11-01,1,['71.060.50'],ISO/TC 47,9599,,[11152],"['en','fr']",6,"<p>Applicable to products having a S compounds content, expressed as sulphate, of equal to or more than 5 mg/kg. Bases of progressive neutralization, with evolution of carbon dioxide, by adding slowly a mixture of hydriodic acid and hypophosphoruos acid. Reduction of the compounds to hydrogen sulphide by heating. Distilation of the hydrogen sulfide, entrainment in a flow of oxyge

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).