ISO/NP 26612

Natural Cellulosic Fibres--Determination of Cellulose Degree of Polymerization — Ionic Liquids Method

General information

Current stage: 10.20 Effective date: Feb 6, 2026

Originator: ISO

Owner: ISO/TC 38/SC 23

Type: International Standard

Scope

This document specifies the test method for determining the viscosity-average degree of polymerization (DP) of cellulose in natural cellulosic fibres by viscometry measurements of solutions of cellulose in the mixture of 1-butyl-3-methylimidazolium acetate (BMIMOAc) and dimethyl sulfoxide (DMSO).
This document is primarily applicable to natural cellulosic fibres and pure spun cellulosic yarns and fabrics.

Life cycle

NOW

IN_DEVELOPMENT
ISO/NP 26612
10.20 New project ballot initiated
Feb 6, 2026