SIST EN ISO 3451-5:2025

SLOVENSKI STANDARD
01-julij-2025
Polimerni materiali - Določevanje pepela - 5. del: Polivinilklorid (ISO 3451-5:2025)
Plastics - Determination of ash - Part 5: Poly(vinyl chloride) (ISO 3451-5:2025)
Kunststoffe - Bestimmung der Asche - Teil 5: Polyvinylchloride (ISO 3451-5:2025)
Plastiques - Détermination du taux de cendres - Partie 5: Poly(chlorure de vinyle) (ISO
3451-5:2025)
Ta slovenski standard je istoveten z: EN ISO 3451-5:2025
ICS:
83.080.20 Plastomeri Thermoplastic materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 3451-5
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2025
EUROPÄISCHE NORM
ICS 83.080.20 Supersedes EN ISO 3451-5:2002
English Version
Plastics - Determination of ash - Part 5: Poly(vinyl
chloride) (ISO 3451-5:2025)
Plastiques - Détermination du taux de cendres - Partie Kunststoffe - Bestimmung der Asche - Teil 5:
5: Poly(chlorure de vinyle) (ISO 3451-5:2025) Polyvinylchloride (ISO 3451-5:2025)
This European Standard was approved by CEN on 3 May 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 3451-5:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 3451-5:2025) 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 November 2025, and conflicting national standards
shall be withdrawn at the latest by November 2025.
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 3451-5:2002.
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 3451-5:2025 has been approved by CEN as EN ISO 3451-5:2025 without any
modification.
International
Standard
ISO 3451-5
Third edition
Plastics — Determination of ash —
2025-04
Part 5:
Poly(vinyl chloride)
Plastiques — Détermination du taux de cendres —
Partie 5: Poly(chlorure de vinyle)
Reference number
ISO 3451-5:2025(en) © ISO 2025

ISO 3451-5:2025(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 3451-5:2025(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
4.1 Method A (direct calcination) .1
4.2 Method B (calcination, with sulfuric acid treatment after combustion) .2
4.3 Method C (calcination, with sulfuric acid treatment before combustion) .2
5 Reagents (for methods B and C only) . 2
6 Apparatus . 2
7 Safety precautions. 3
8 Procedure . 3
8.1 Test portion .3
8.2 Method A (determination of unsulfated ash) .4
8.3 Method B (determination of sulfated ash) .4
8.4 Method C (determination of sulfated ash) .5
9 Number of determinations . 5
10 Expression of results . 5
11 Accuracy and precision . 6
12 Test report . 6
Annex A (informative) Summary of test results for PVC compounds filled with chalk (CaCO ) . 7
iii
ISO 3451-5:2025(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 5, Physical-
chemical properties, 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 3451-5:2002), which has been technically
revised.
The main changes are as follows:
— the test conditions have been adapted to relevant fillers;
— the thermobalance has been added as alternative method;
— the results of an interlaboratory comparison have been added to justify the changed test conditions for
PVC compounds filled with chalk (CaCO ).
A list of all parts in the ISO 3451 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 3451-5:2025(en)
Plastics — Determination of ash —
Part 5:
Poly(vinyl chloride)
WARNING — The use of this document may involve hazardous chemicals, materials, operations or
equipment. This document does not purport to address the safety problems associated with its use.
It is the responsibility of the user of this document to establish proper safety and health practices,
and determine the application of regulatory limitations prior to use. Poly(vinyl chloride) evolves
hydrogen chloride on thermal decomposition and precautions should be taken to avoid inhalation of
these or other fumes.
1 Scope
This document specifies three methods for the determination of the ash of poly(vinyl chloride).
The general procedures given in ISO 3451-1 are followed. For ash, method A is used. For sulfated ash,
methods B and C are used. All three methods are applicable to resins, compounds and finished products.
Methods B and C are applicable when lead-containing compounds are present.
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 (incl
...