EN ISO 1833-21:2019
(Main)Textiles - Quantitative chemical analysis - Part 21: Mixtures of chlorofibres, certain modacrylics, certain elastanes, acetates, triacetates with certain other fibres (method using cyclohexanone) (ISO 1833-21:2019)
General Information
- Abstract
This document specifies a method, using cyclohexanone, to determine the mass percentage of chlorofibre, modacrylic, elastane, acetate and triacetate, after removal of non-fibrous matter, in textiles made of mixtures of
— acetate, triacetate, chlorofibre, certain modacrylics, certain elastanes
with
— wool, animal hair, silk, cotton, cupro, modal, viscose, lyocell, polyamide, acrylic, melamine, polyacrylate and glass fibres.
It is also possible to analyse mixtures containing chlorofibres by using the test methods described in ISO 1833-13 or ISO 1833-17.
- Status
- Published
- Publication Date
- 14-May-2019
- Withdrawal Date
- 29-Nov-2019
- Technical Committee
- CEN/TC 248 - Textiles and textile products
- Drafting Committee
- CEN/TC 248 - Textiles and textile products
- Current Stage
- 6060 - Definitive text made available (DAV) - Publishing
- Start Date
- 15-May-2019
- Completion Date
- 15-May-2019
Overview
EN ISO 1833-21:2019 is an international standard developed by ISO and adopted by CEN, specifying a reliable quantitative chemical analysis method for textiles composed of complex fiber mixtures. This standard focuses on determining the mass percentage of chlorofibres, certain modacrylics, elastanes, acetates, and triacetates in blends with other fibers such as wool, silk, cotton, and synthetic fibers. The analysis employs cyclohexanone as the primary solvent to dissolve specific fibers selectively, enabling accurate measurement after removal of non-fibrous matter.
This method is critical to the textile industry for quality control, fiber content certification, and compliance with labeling regulations, offering consistent and reproducible results with a high precision level.
Key Topics
- Scope and Fibre Types: Applicable for mixtures containing chlorofibres, certain modacrylic fibers, elastanes, acetates, triacetates blended with wool, animal hair, silk, cotton, cupro, modal, viscose, lyocell, polyamide, acrylic, melamine, polyacrylate, and glass fibers.
- Method Principle: Dissolution of select fibers using cyclohexanone near its boiling point; residue is filtered, washed, dried, and weighed to calculate mass percentages.
- Apparatus Requirements: Includes specialized hot extraction equipment with reflux condenser, filter crucible, porous baffle, and heating device suited for cyclohexanone's boiling point (~156 °C).
- Procedure Highlights:
- Use 100 ml cyclohexanone per gram of textile sample.
- Hot extraction conducted for 60 minutes with controlled reflux cycles.
- Washing with heated 50% ethanol and water without suction during wash phases.
- Drying and weighing the remaining residue to determine fiber composition.
- Calculation and Precision: Results are calculated per ISO 1833-1 guidelines with corrected factors for certain fibers (e.g., silk, melamine, polyacrylate). Precision confidence limits are ±1 percentage point at 95% confidence.
- Safety: Cyclohexanone is flammable and toxic; proper precautions required during handling.
Applications
- Textile Quality Control: Enables manufacturers and quality inspectors to verify fiber composition in blended textiles, ensuring product consistency and customer transparency.
- Regulatory Compliance: Assists in meeting labeling laws and trade requirements by accurately quantifying fiber content in complex textile mixtures.
- Material Authentication: Useful in detecting fiber adulteration or verifying claims on textile products involving specialty fibers such as modacrylics, elastanes, and chlorofibres.
- Research and Development: Supports fiber blend optimization and innovation in performance textiles by providing precise compositional data.
- Industry Standardization: Serves as a harmonized method across European countries and beyond, facilitating international trade and quality benchmarking.
Related Standards
- ISO 1833-1: General principles of quantitative chemical analysis for textiles, providing overarching methodology for test execution and result interpretation.
- ISO 1833-13: Alternative test method for mixtures containing chlorofibres using carbon disulfide/acetone as solvents.
- ISO 1833-17: Focused on chlorofibre homopolymers analyzed with sulfuric acid for particular fiber blends.
- ISO 2076: Defines generic names of man-made fibres for standardized terminology.
- ISO 6938: Covers generic names and definitions for natural fibers, complementing analyses involving mixed fiber types.
By detailing a precise chemical analysis procedure using cyclohexanone, EN ISO 1833-21:2019 ensures textile manufacturers and laboratories can reliably quantify specific fibers in complex blends. This supports transparency, quality assurance, and regulatory compliance in the global textile industry.
Relations
- Effective Date
- 22-May-2019
- Refers
ISO 1833-1:2006 - Textiles — Quantitative chemical analysis — Part 1: General principles of testing - Effective Date
- 25-Aug-2026
- Effective Date
- 12-Feb-2026
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Frequently Asked Questions
EN ISO 1833-21:2019 is a standard published by the European Committee for Standardization (CEN). Its full title is "Textiles - Quantitative chemical analysis - Part 21: Mixtures of chlorofibres, certain modacrylics, certain elastanes, acetates, triacetates with certain other fibres (method using cyclohexanone) (ISO 1833-21:2019)". This standard covers: This document specifies a method, using cyclohexanone, to determine the mass percentage of chlorofibre, modacrylic, elastane, acetate and triacetate, after removal of non-fibrous matter, in textiles made of mixtures of — acetate, triacetate, chlorofibre, certain modacrylics, certain elastanes with — wool, animal hair, silk, cotton, cupro, modal, viscose, lyocell, polyamide, acrylic, melamine, polyacrylate and glass fibres. It is also possible to analyse mixtures containing chlorofibres by using the test methods described in ISO 1833-13 or ISO 1833-17.
This document specifies a method, using cyclohexanone, to determine the mass percentage of chlorofibre, modacrylic, elastane, acetate and triacetate, after removal of non-fibrous matter, in textiles made of mixtures of — acetate, triacetate, chlorofibre, certain modacrylics, certain elastanes with — wool, animal hair, silk, cotton, cupro, modal, viscose, lyocell, polyamide, acrylic, melamine, polyacrylate and glass fibres. It is also possible to analyse mixtures containing chlorofibres by using the test methods described in ISO 1833-13 or ISO 1833-17.
EN ISO 1833-21:2019 is classified under the following ICS (International Classification for Standards) categories: 59.060.01 - Textile fibres in general. The ICS classification helps identify the subject area and facilitates finding related standards.
EN ISO 1833-21:2019 has the following relationships with other standards: It is inter standard links to EN ISO 1833-21:2010, ISO 1833-1:2006, ISO 1833-21:2019. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN ISO 1833-21:2019 is associated with the following European legislation: EU Directives/Regulations: 1007/2011; Standardization Mandates: M/532. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
EN ISO 1833-21:2019 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2019
Nadomešča:
SIST EN ISO 1833-21:2013
Tekstilije - Kvantitativna kemična analiza - 21. del: Mešanica klorovlaken, nekaterih
modakrilnih, nekaterih elastanovih, acetatnih, triacetatnih in nekaterih drugih
vlaken (metoda z uporabo cikloheksanona) (ISO 1833-21:2019)
Textiles - Quantitative chemical analysis - Part 21: Mixtures of chlorofibres, certain
modacrylics, certain elastanes, acetates, triacetates and certain other fibres (method
using cyclohexanone) (ISO 1833-21:2019)
Textilien - Quantitative chemische Analysen - Teil 21: Mischungen aus Chlorfasern,
bestimmten Modacrylfasern, bestimmten Elastanfasern, Acetatfasern, Triacetatfasern
mit bestimmten anderen Fasern (Cyclohexanon-Verfahren) (ISO 1833-21:2019)
Textiles - Analyse chimique quantitative - Partie 21: Mélanges de chlorofibres, certains
modacryliques, certains élasthannes, acétates, triacétates et de certaines autres fibres
(méthode à la cyclohexanone) (ISO 1833-21:2019)
Ta slovenski standard je istoveten z: EN ISO 1833-21:2019
ICS:
59.060.20 Umetna vlakna Man-made fibres
71.040.40 Kemijska analiza Chemical analysis
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 1833-21
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2019
EUROPÄISCHE NORM
ICS 59.060.01 Supersedes EN ISO 1833-21:2010
English Version
Textiles - Quantitative chemical analysis - Part 21:
Mixtures of chlorofibres, certain modacrylics, certain
elastanes, acetates, triacetates and certain other fibres
(method using cyclohexanone) (ISO 1833-21:2019)
Textiles - Analyse chimique quantitative - Partie 21: Textilien - Quantitative chemische Analysen - Teil 21:
Mélanges de chlorofibres, certains modacryliques, Mischungen aus Chlorfasern, bestimmten
certains élasthannes, acétates, triacétates et de Modacrylfasern, bestimmten Elastanfasern,
certaines autres fibres (méthode à la cyclohexanone) Acetatfasern, Triacetatfasern mit bestimmten anderen
(ISO 1833-21:2019) Fasern (Cyclohexanon-Verfahren) (ISO 1833-21:2019)
This European Standard was approved by CEN on 11 May 2019.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 1833-21:2019 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 1833-21:2019) has been prepared by Technical Committee ISO/TC 38
"Textiles" in collaboration with Technical Committee CEN/TC 248 “Textiles and textile products” the
secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by November 2019, and conflicting national standards
shall be withdrawn at the latest by November 2019.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 1833-21:2010.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 1833-21:2019 has been approved by CEN as EN ISO 1833-21:2019 without any
modification.
INTERNATIONAL ISO
STANDARD 1833-21
Second edition
2019-04
Textiles — Quantitative chemical
analysis —
Part 21:
Mixtures of chlorofibres, certain
modacrylics, certain elastanes,
acetates, triacetates with certain other
fibres (method using cyclohexanone)
Textiles — Analyse chimique quantitative —
Partie 21: Mélanges de chlorofibres, certains modacryliques, certains
élasthannes, acétates, triacétates avec certaines autres fibres
(méthode à la cyclohexanone)
Reference number
ISO 1833-21:2019(E)
©
ISO 2019
ISO 1833-21:2019(E)
© ISO 2019
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ii © ISO 2019 – All rights reserved
ISO 1833-21:2019(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 2
6 Apparatus . 2
7 Procedure. 2
8 Calculation and expression of results . 3
9 Precision . 3
Annex
...