# ISO 1628-1:2021 — Withdrawn and superseded ISO standards

For ISO 1628-1:2021, item title is Plastics — Determination of the viscosity of polymers in dilute solution using capillary viscometers — Part 1: General principles; status code is 9599; successor is ISO 1628-1:2024; withdrawn / published date is 2021-02-26, recorded from its source on 2026-08-05.

- **Identifier:** ISO 1628-1:2021 _(verified: appears in the quote below)_
- **Item title:** Plastics — Determination of the viscosity of polymers in dilute solution using capillary viscometers — Part 1: General principles _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 1628-1:2024
- **Withdrawn / published date:** 2021-02-26 _(verified: appears in the quote below)_

## What the source says

> 79996,IS,,ISO 1628-1:2021,Plastics — Determination of the viscosity of polymers in dilute solution using capillary viscometers — Part 1: General principles,Plastiques — Détermination de la viscosité des polymères en solution diluée à l'aide de viscosimètres à capillaires — Partie 1: Principes généraux,2021-02-26,4,['83.080.01'],ISO/TC 61/SC 5,9599,"[51946,56473]",[86451],"['en','fr']",16,"<p>This document defines the general conditions for the determination of the reduced viscosity, intrinsic viscosity and <i>K</i>‑value of organic polymers in dilute solution. It defines the standard parameters that are applied to viscosity measurement.</p><p>This document is used to develop standards for me

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).