# ISO 7537:1989 — Withdrawn and superseded ISO standards

For ISO 7537:1989, item title is Petroleum products — Determination of total acid number — Semi-micro colour-indicator titration method; status code is 9599; successor is ISO 7537:1997; withdrawn / published date is 1989-09-21, recorded from its source on 2026-08-05.

- **Identifier:** ISO 7537:1989 _(verified: appears in the quote below)_
- **Item title:** Petroleum products — Determination of total acid number — Semi-micro colour-indicator titration method _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 7537:1997
- **Withdrawn / published date:** 1989-09-21 _(verified: appears in the quote below)_

## What the source says

> 14313,IS,,ISO 7537:1989,Petroleum products — Determination of total acid number — Semi-micro colour-indicator titration method,Produits pétroliers — Détermination de l'indice d'acide total — Semi-microméthode de titrage par indicateur coloré,1989-09-21,1,['75.080'],ISO/TC 28,9599,,[26477],"['en','fr']",6,

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).