# ISO 1157:1975 — Withdrawn and superseded ISO standards

For ISO 1157:1975, item title is Plastics — Cellulose acetate in dilute solution — Determination of viscosity number and viscosity ratio; status code is 9599; successor is ISO 1157:1990; withdrawn / published date is 1975-06-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 1157:1975 _(verified: appears in the quote below)_
- **Item title:** Plastics — Cellulose acetate in dilute solution — Determination of viscosity number and viscosity ratio _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 1157:1990
- **Withdrawn / published date:** 1975-06-01 _(verified: appears in the quote below)_

## What the source says

> 5725,IS,,ISO 1157:1975,Plastics — Cellulose acetate in dilute solution — Determination of viscosity number and viscosity ratio,Matières plastiques — Acétate de cellulose en solution diluée — Détermination de l'indice et du rapport de viscosité,1975-06-01,1,['83.080.20'],ISO/TC 61,9599,,[5726],"['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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).