# ISO 2303:1990/Amd 1:1993 — Withdrawn and superseded ISO standards For ISO 2303:1990/Amd 1:1993, item title is Isoprene rubber (IR) — Non-oil-extended, solution-polymerized types — Evaluation procedure — Amendment 1; status code is 9599; successor is ISO 2303:2003; withdrawn / published date is 1993-11-04, recorded from its source on 2026-08-05. - **Identifier:** ISO 2303:1990/Amd 1:1993 _(verified: appears in the quote below)_ - **Item title:** Isoprene rubber (IR) — Non-oil-extended, solution-polymerized types — Evaluation procedure — Amendment 1 _(verified: appears in the quote below)_ - **Status code:** 9599 _(verified: appears in the quote below)_ - **Successor:** ISO 2303:2003 - **Withdrawn / published date:** 1993-11-04 _(verified: appears in the quote below)_ ## What the source says > 7134,IS,Amd,ISO 2303:1990/Amd 1:1993,"Isoprene rubber (IR) — Non-oil-extended, solution-polymerized types — Evaluation procedure — Amendment 1",Caoutchouc isoprène (IR) — Types polymérisés en solution et non étendus à l'huile — Méthode d'évaluation — Amendement 1,1993-11-04,3,['83.060'],ISO/TC 45/SC 3,9599,,[29382],"['en','fr']",3,"

Defines standard materials, equipment and processing methods for evaluating the vulcanization characteristics of polyisopren rubber.

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 Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).