# ISO 305:1976 — Withdrawn and superseded ISO standards

For ISO 305:1976, item title is Plastics — Determination of thermal stability of polyvinyl chloride, related chlorine-containing polymers and copolymers, and their compounds — Discoloration method; status code is 9599; successor is ISO 305:1990; withdrawn / published date is 1976-07-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 305:1976 _(verified: appears in the quote below)_
- **Item title:** Plastics — Determination of thermal stability of polyvinyl chloride, related chlorine-containing polymers and copolymers, and their compounds — Discoloration method _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 305:1990
- **Withdrawn / published date:** 1976-07-01 _(verified: appears in the quote below)_

## What the source says

> 4239,IS,,ISO 305:1976,"Plastics — Determination of thermal stability of polyvinyl chloride, related chlorine-containing polymers and copolymers, and their compounds — Discoloration method","Matières plastiques — Détermination de la stabilité thermique du polychlorure de vinyle, des copolymères chlorés apparentés et de leurs compositions — Méthode du changement de couleur",1976-07-01,1,['83.080.20'],ISO/TC 61,9599,,[4240],"['en','fr']",2,

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).