SIST EN ISO 182-3:2026
(Main)Plastics - Determination of the tendency of compounds and products based on vinyl chloride homopolymers and copolymers to evolve hydrogen chloride and any other acidic products at elevated temperatures - Part 3: Conductometric method (ISO 182-3:2025)
Plastics - Determination of the tendency of compounds and products based on vinyl chloride homopolymers and copolymers to evolve hydrogen chloride and any other acidic products at elevated temperatures - Part 3: Conductometric method (ISO 182-3:2025)
This document specifies a method for the determination of the thermal stability at elevated temperature of compounds and products based on vinyl chloride homopolymers and copolymers (in the following text abbreviated as PVC) which undergo dehydrochlorination (the evolution of hydrogen chloride).
This document is applicable to the characterization of PVC compounds and products, especially with regard to the effectiveness of their heat-stabilizing systems.
It is applicable to coloured PVC compounds and products where a discolouration test under the action of heat can be unsatisfactory.
This document is applicable to compounded PVC materials and products. It can be applicable to polymers in powder form under appropriate conditions, depending on the agreement between the interested parties.
This document does not apply to PVC compounds in the form of dry blends, since such materials might not be sufficiently homogeneous.
This document does not apply to PVC compounds and products which evolve other decomposition products, in addition to hydrogen chloride, at elevated temperatures that can affect the conductivity of water when they are absorbed into it.
NOTE In this case, ISO 182-4 [2] provides the suitable method for the determination of chloride ion (Cl−) in the absorbing solution.
This document can also be applied to other plastics materials which can evolve hydrogen chloride or other hydrogen halides when heated under the conditions prescribed by the relevant specifications, or as agreed upon between the interested parties.
Kunststoffe - Bestimmung der Neigung von Formmassen und Erzeugnissen auf der Basis von Vinylchlorid-Homopolymeren und -Copolymeren, bei erhöhten Temperaturen Chlorwasserstoff und andere saure Produkte abzugeben - Teil 3: Leitfähigkeitsverfahren (ISO 182-3:2025)
1.1 Dieses Dokument legt ein Verfahren zur Bestimmung der thermischen Stabilität von Formmassen und Erzeugnissen bei erhöhter Temperatur fest, die auf der Basis von Vinylchlorid-Homopolymeren und Copolymeren (im folgenden Text abgekürzt als PVC) hergestellt sind und die eine Dehydrochlorierung (Abspaltung von Chlorwasserstoff) durchlaufen.
1.2 Dieses Dokument ist zur Charakterisierung von Formmassen und Erzeugnissen aus PVC anwendbar, insbesondere hinsichtlich der Wirksamkeit ihrer Wärmestabilisierungssysteme.
Es ist anwendbar für gefärbte PVC-Formmassen und PVC-Erzeugnisse, bei denen eine Verfärbungsprüfung unter Wärmeeinwirkung unbefriedigend sein kann.
1.3 Dieses Dokument ist anwendbar für endgefertigte Werkstoffe und Erzeugnisse aus PVC. Unter bestimmten Bedingungen, in Abhängigkeit von der Vereinbarung zwischen den interessierten Parteien, kann es für Polymere in Pulverform angewendet werden.
Dieses Dokument ist nicht anwendbar für trockene Mischungen von PVC-Formmassen, da solche Werkstoffe möglicherweise nicht homogen genug sind.
1.4 Dieses Dokument ist nicht anwendbar für Formmassen und Erzeugnisse aus PVC, die bei erhöhten Temperaturen andere Zersetzungsprodukte als Chlorwasserstoff abgeben, welche die Leitfähigkeit von Wasser, wenn sie darin absorbiert werden, verändern können.
ANMERKUNG In diesem Fall stellt ISO 182 4 [2] das geeignete Verfahren zur Bestimmung des Chlorid-Ions (Cl−) in der absorbierenden Lösung zur Verfügung.
1.5 Dieses Dokument kann auch für andere Kunststoffe angewendet werden, die bei Erwärmung, entsprechend den in den einschlägigen Spezifikationen festgelegten Bedingungen oder entsprechend den Vereinbarungen zwischen den interessierten Parteien, Chlorwasserstoff oder andere Halogenwasserstoffe abgeben können.
WARNUNG — Die Anwendung dieses Dokuments kann die Anwendung gefährlicher Stoffe, Arbeitsgänge und Geräte mit sich bringen. Dieses Dokument beansprucht nicht, sämtliche mit seiner Anwendung verbundenen Sicherheitsprobleme zu behandeln. Es liegt in der Verantwortung des Anwenders dieses Dokuments, vor ihrer Anwendung geeignete Maßnahmen für die Sicherheit und den Gesundheitsschutz des Personals zu ergreifen, und dafür Sorge zu tragen, dass behördliche und gesetzliche Maßnahmen eingehalten werden.
Plastiques - Détermination de la tendance des compositions et produits à base d’homopolymères et de copolymères du chlorure de vinyle à dégager du chlorure d’hydrogène et éventuellement d’autres produits acides à températures élevées - Partie 3: Méthode conductimétrique (ISO 182-3:2025)
Le présent document spécifie une méthode pour la détermination de la stabilité thermique à températures élevées des compositions et produits à base d’homopolymères et de copolymères du chlorure de vinyle (PVC dans le texte qui suit), qui sont sujets à une déhydrochloruration (dégagement de chlorure d’hydrogène).
Le présent document s’applique à la caractérisation des compositions et produits à base de PVC, en particulier en ce qui concerne l’efficacité de leurs systèmes de stabilisation à la chaleur.
Il est applicable aux compositions et produits à base de PVC colorés, lorsqu’un essai de décoloration sous l’action de la chaleur peut être insatisfaisant.
Le présent document est applicable aux matériaux et produits composés de PVC. Il peut être applicable aux polymères sous forme de poudres dans des conditions appropriées en fonction de l’accord entre les parties intéressées.
Le présent document ne s’applique pas aux compositions de PVC sous forme de mélanges secs, ces matériaux pouvant ne pas être suffisamment homogénéisés.
Le présent document ne s’applique pas aux compositions et produits à base de PVC qui dégagent, à températures élevées, des produits de décomposition en plus du chlorure d’hydrogène pouvant avoir une incidence sur la conductivité de l’eau lorsqu’ils y sont absorbés.
NOTE Dans ce cas, l’ISO 182-4 [2] fournie la méthode appropriée pour la détermination des ions chlorures (Cl−) dans la solution absorbante.
Le présent document peut aussi être appliqué à d’autres matériaux plastiques pouvant dégager du chlorure d’hydrogène ou d’autres halogénures d’hydrogène lorsqu’ils sont chauffés dans des conditions particulières prescrites dans les spécifications appropriées ou convenues entre les parties intéressées.
Polimerni materiali - Ugotavljanje tendence zmesi in proizvodov na osnovi homo- in kopolimerov vinilklorida po sproščanju klorovodika ali drugih kislih produktov pri povišanih temperaturah - 3. del: Konduktometrična metoda (ISO 182-3:2025)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2026
Polimerni materiali - Ugotavljanje tendence zmesi in proizvodov na osnovi homo-
in kopolimerov vinilklorida po sproščanju klorovodika ali drugih kislih produktov
pri povišanih temperaturah - 3. del: Konduktometrična metoda (ISO 182-3:2025)
Plastics - Determination of the tendency of compounds and products based on vinyl
chloride homopolymers and copolymers to evolve hydrogen chloride and any other
acidic products at elevated temperatures - Part 3: Conductometric method (ISO 182-
3:2025)
Kunststoffe - Bestimmung der Neigung von Formmassen und Erzeugnissen auf der
Basis von Vinylchlorid-Homopolymeren und -Copolymeren, bei erhöhten Temperaturen
Chlorwasserstoff und andere saure Produkte abzugeben - Teil 3: Leitfähigkeitsverfahren
(ISO 182-3:2025)
Plastiques - Détermination de la tendance des compositions et produits à base
d’homopolymères et de copolymères du chlorure de vinyle à dégager du chlorure
d’hydrogène et éventuellement d’autres produits acides à températures élevées - Partie
3: Méthode conductimétrique (ISO 182-3:2025)
Ta slovenski standard je istoveten z: EN ISO 182-3:2025
ICS:
83.080.20 Plastomeri Thermoplastic materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 182-3
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2025
EUROPÄISCHE NORM
ICS 83.080.20 Supersedes EN ISO 182-3:2023
English Version
Plastics - Determination of the tendency of compounds and
products based on vinyl chloride homopolymers and
copolymers to evolve hydrogen chloride and any other
acidic products at elevated temperatures - Part 3:
Conductometric method (ISO 182-3:2025)
Plastiques - Détermination de la tendance des Kunststoffe - Bestimmung der Neigung von
compositions et produits à base d'homopolymères et Formmassen und Erzeugnissen auf der Basis von
de copolymères du chlorure de vinyle à dégager du Vinylchlorid-Homopolymeren und -Copolymeren, bei
chlorure d'hydrogène et éventuellement d'autres erhöhten Temperaturen Chlorwasserstoff und andere
produits acides à températures élevées - Partie 3: saure Produkte abzugeben - Teil 3:
Méthode conductimétrique (ISO 182-3:2025) Leitfähigkeitsverfahren (ISO 182-3:2025)
This European Standard was approved by CEN on 27 October 2025.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye 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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 182-3:2025 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 182-3:2025) has been prepared by Technical Committee ISO/TC 61 "Plastics" in
collaboration with Technical Committee CEN/TC 249 “Plastics” the secretariat of which is held by SIS.
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 April 2026, and conflicting national standards shall be
withdrawn at the latest by April 2026.
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 182-3:2023.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 182-3:2025 has been approved by CEN as EN ISO 182-3:2025 without any modification.
International
Standard
ISO 182-3
Third edition
Plastics — Determination of
2025-10
the tendency of compounds and
products based on vinyl chloride
homopolymers and copolymers to
evolve hydrogen chloride and any
other acidic products at elevated
temperatures —
Part 3:
Conductometric method
Plastiques — Détermination de la tendance des compositions et
produits à base d’homopolymères et de copolymères du chlorure
de vinyle à dégager du chlorure d’hydrogène et éventuellement
d’autres produits acides à températures élevées —
Partie 3: Méthode conductimétrique
Reference number
ISO 182-3:2025(en) © ISO 2025
ISO 182-3:2025(en)
© ISO 2025
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 182-3:2025(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Principle . 2
5 Reagents . 2
6 Apparatus . 2
7 Preparation of test samples . 7
7.1 General .7
7.2 PVC plastisols . .7
7.3 PVC pellets, extrudates, mouldings, thick sheet, etc. .7
7.4 PVC film and sheet .7
7.5 PVC coatings .7
7.6 Cable and conductor insulation or sheating .7
8 Number of tests . 7
9 Temperatures for dehydrochlorination . 7
10 Test procedure . 8
10.1 Preparation of test portion .8
10.2 Preliminary operations .8
10.3 Special precautions when using dehydrochlorination cell A .8
10.4 Preparation of the measurement cell .8
10.5 Decomposition of the test portion .8
11 Expression of results . 9
12 Test report . 9
13 Precision . 9
13.1 General .9
13.2 Repeatability .10
13.3 Reproducibility .10
13.4 Comparison with the pH-meter method (ISO 182-2) .10
13.5 Factors affecting the stability time .10
13.6 Conclusions . 12
Annex A (informative) Cleaning of the apparatus .13
Annex B (informative) Calculation of repeatability and reproducibility — Conductometric and
pH-meter methods . 14
Annex C (informative) Interlaboratory test.16
Bibliography .18
iii
ISO 182-3:2025(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 9, Thermoplastic
materials, in collaboration with the European Committee for Standardization (CEN) Technical Committee
CEN/TC 249, Plastics, in accordance with the Agreement on technical cooperation between ISO and CEN
(Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 182-3:2023), of which it constitutes a minor
revision.
The changes are as follows:
— the reference to ISO 182-4 in the Scope has been placed in a Note;
— the unit min has been added to m, r, and R in Clause 13;
— the code for stability time in Table 1 has been corrected to t ;
s
— the unit of t in Table 2 has been corrected to min.
s
A list of all parts in the ISO 182 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
International Standard ISO 182-3:2025(en)
Plastics — Determination of the tendency of compounds
and products based on vinyl chloride homopolymers and
copolymers to evolve hydrogen chloride and any other acidic
products at elevated temperatures —
Part 3:
Conductometric method
WARNING — The use of this document can involve hazardous materials, operations and equipment.
This document does not purport to address all of the safety problems associated with its use. It is the
responsibility of the user of this document to establish appropriate safety and health practices and
determine the applicability of regulatory limitations prior to use.
1 Scope
1.1 This document specifies a method for the determination of the thermal stability at elevated
temperature of compounds and products based on vinyl chloride homopolymers and copolymers (in the
following text abbreviated as PVC) which undergo dehydrochlorination (the evolution of hydrogen chloride).
1.2 This document is applicable to the characterization of PVC compounds and products, especially with
regard to the effectiveness of their heat-stabilizing systems.
It is applicable to coloured PVC compounds and products where a discolouration test under the action of
heat can be unsatisfactory.
1.3 This document is applicable to compounded PVC materials and products. It can be applicable to
polymers in powder form under appropriate conditions, depending on the agreement between the interested
parties.
This document does not apply to PVC compounds in the form of dry blends, since such materials might not
be sufficiently homogeneous.
1.4 This document does not apply to PVC compounds and products which evolve other decomposition
products, in addition to hydrogen chloride, at elevated temperatures that can affect the conductivity of
water when they are absorbed into it.
[2] −
NOTE In this case, ISO 182-4 provides the suitable method for the determination of chloride ion (Cl ) in the
absorbing solution.
1.5 This document can also be applied to other plastics materials which can evolve hydrogen chloride or
other hydrogen halides when heated under the conditions prescribed by the relevant specifications, or as
agreed upon between the interested parties.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 182-3:2025(en)
ISO 565, Test sieves — Metal wire cloth, perforated metal plate and electroformed sheet — Nominal sizes of
openings
ISO 4793, Laboratory sintered (fritted) filters — Porosity grading, classification and designation
ISO 6353-2, Reagents for chemical analysis — Part 2: Specifications — First series
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
stability time
t
s
time, measured by reference to a predetermined change in the conductivity of absorbing demineralized
water, required for a certain amount of hydrogen chloride to be evolved when a prescribed mass of PVC
compound or product is maintained at an elevated temperature under the test conditions specified in this
document
4 Principle
A test portion of the PVC compound or product is maintained at an agreed temperature in a nitrogen gas
stream and the hydrogen chloride evolved is absorbed in a given amount of demineralized water. The amount
of hydrogen chloride evolved is determined in relation to the recorded change in conductivity of the water.
...
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