# ISO 7391-1:2006 — Withdrawn and superseded ISO standards For ISO 7391-1:2006, item title is Plastics — Polycarbonate (PC) moulding and extrusion materials — Part 1: Designation system and basis for specifications; status code is 9599; successor is ISO 21305-1:2019; withdrawn / published date is 2006-03-02, recorded from its source on 2026-08-05. - **Identifier:** ISO 7391-1:2006 _(verified: appears in the quote below)_ - **Item title:** Plastics — Polycarbonate (PC) moulding and extrusion materials — Part 1: Designation system and basis for specifications _(verified: appears in the quote below)_ - **Status code:** 9599 _(verified: appears in the quote below)_ - **Successor:** ISO 21305-1:2019 - **Withdrawn / published date:** 2006-03-02 _(verified: appears in the quote below)_ ## What the source says > 36275,IS,,ISO 7391-1:2006,Plastics — Polycarbonate (PC) moulding and extrusion materials — Part 1: Designation system and basis for specifications,Plastiques — Polycarbonate (PC) pour moulage et extrusion — Partie 1: Système de désignation et base de spécification,2006-03-02,3,['83.080.20'],ISO/TC 61/SC 9,9599,[25181],[70507],"['en','fr']",7,"

ISO 7391-1:2006 establishes a system of designation for polycarbonate thermoplastic material, which may be used as the basis for specifications.

The types of polycarbonate plastic are differentiated from each other by a classification system based on appropriate levels of the designatory properties

  1. viscosity number
  2. melt volum ## 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 Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).