SIST EN ISO 1043-4:2021/A1:2026
(Amendment)Plastics - Symbols and abbreviated terms - Part 4: Flame retardants - Amendment 1: New code numbers for flame retardants (ISO 1043-4:2021/Amd 1:2026)
Plastics - Symbols and abbreviated terms - Part 4: Flame retardants - Amendment 1: New code numbers for flame retardants (ISO 1043-4:2021/Amd 1:2026)
Kunststoffe - Kennbuchstaben und Kurzzeichen - Teil 4: Flammschutzmittel - Änderung 1 (ISO 1043-4:2021/Amd 1:2026)
Plastiques - Symboles et termes abrégés - Partie 4: Ignifuges - Amendement 1: Nouveaux nombres-codes (ISO 1043-4:2021/Amd 1:2026)
Polimerni materiali - Simboli in kratice - 4. del: Zaviralci gorenja - Dopolnilo A1 (ISO 1043-4:2021/Amd 1:2026)
General Information
- Status
- Published
- Public Enquiry End Date
- 09-Jun-2025
- Publication Date
- 06-Apr-2026
- Technical Committee
- IPMA - Polimer materials and products
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 24-Mar-2026
- Due Date
- 29-May-2026
- Completion Date
- 07-Apr-2026
Relations
- Effective Date
- 18-Dec-2024
Overview
EN ISO 1043-4:2021/prA1 (ISO 1043-4:2021/DAM 1:2025) is an amendment to the ISO 1043 series that updates the standardised symbols and abbreviated terms for flame retardants in plastics. This draft amendment revises the coded identification system used to denote specific classes of flame-retardant additives - helping manufacturers, specifiers and regulators to label and communicate material compositions consistently.
Key topics
- Purpose: maintain a harmonised coding scheme for flame retardants used in plastics by updating specific code assignments.
- Updated code lists for nitrogen compounds and organic phosphorus compounds:
- Nitrogen compounds (codes replaced to):
- 30 melamine
- 31 urea
- 32 monomeric melamine-based compounds (melamine salts)
- 33 polymeric melamine-based compounds
- 34 N-alkoxy hindered amine-based compounds
- 35 other nitrogen-based compounds
- 36–39 not allocated
- Organic phosphorus compounds (codes replaced to):
- 40 aryl phosphates
- 41 chlorinated organic phosphorus compounds
- 42 brominated organic phosphorus compounds
- 43 methyl esters of phosphoric or phosphonic acid
- 44 other halogen-free organic phosphorus compounds
- 45–49 not allocated
- Nitrogen compounds (codes replaced to):
- Document status: circulated as a draft amendment (DAM 1:2025) for comment and voting within ISO/TC 61/SC 1 and CEN parallel process. Final text may be subject to change.
Applications
- Clear, standardised labelling of plastic products, data sheets and material declarations to indicate the type of flame retardant used.
- Supply-chain communication between resin producers, compounders, OEMs and recyclers where identifying additive chemistry is important for processing, safety and end-of-life handling.
- Regulatory and compliance documentation where consistent terminology and symbol sets simplify reporting and conformity assessment.
- Product design and material selection: helps engineers compare formulations and choose appropriate flame-retardant classes based on performance, halogen content, or regulatory constraints.
Who should use this standard
- Plastics manufacturers and compounders
- Material compliance and regulatory teams
- Product designers and OEMs specifying plastic parts
- Testing and certification laboratories
- Recyclers and waste-management organizations tracking additive chemistries
Related standards
- ISO 1043 series (other parts cover general symbols and abbreviations for plastics)
- EN ISO 1043-4:2021 (base document being amended)
Keywords: ISO 1043-4, EN ISO 1043-4:2021/prA1, flame retardants, plastics symbols, melamine, urea, aryl phosphates, phosphorus flame retardants, standardised codes, material labelling.
Get Certified
Connect with accredited certification bodies for this standard
Smithers Quality Assessments
US management systems and product certification.
DIN CERTCO
DIN Group product certification.
Sponsored listings
Frequently Asked Questions
SIST EN ISO 1043-4:2021/A1:2026 is a amendment published by the Slovenian Institute for Standardization (SIST). Its full title is "Plastics - Symbols and abbreviated terms - Part 4: Flame retardants - Amendment 1: New code numbers for flame retardants (ISO 1043-4:2021/Amd 1:2026)". This standard covers: Plastics - Symbols and abbreviated terms - Part 4: Flame retardants - Amendment 1: New code numbers for flame retardants (ISO 1043-4:2021/Amd 1:2026)
Plastics - Symbols and abbreviated terms - Part 4: Flame retardants - Amendment 1: New code numbers for flame retardants (ISO 1043-4:2021/Amd 1:2026)
SIST EN ISO 1043-4:2021/A1:2026 is classified under the following ICS (International Classification for Standards) categories: 01.075 - Character symbols; 83.040.30 - Auxiliary materials and additives for plastics; 83.080.01 - Plastics in general. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN ISO 1043-4:2021/A1:2026 has the following relationships with other standards: It is inter standard links to SIST EN ISO 1043-4:2021. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN ISO 1043-4:2021/A1:2026 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-maj-2026
Polimerni materiali - Simboli in kratice - 4. del: Zaviralci gorenja - Dopolnilo A1
(ISO 1043-4:2021/Amd 1:2026)
Plastics - Symbols and abbreviated terms - Part 4: Flame retardants - Amendment 1:
New code numbers for flame retardants (ISO 1043-4:2021/Amd 1:2026)
Kunststoffe - Kennbuchstaben und Kurzzeichen - Teil 4: Flammschutzmittel - Änderung
1 (ISO 1043-4:2021/Amd 1:2026)
Plastiques - Symboles et termes abrégés - Partie 4: Ignifuges - Amendement 1:
Nouveaux nombres-codes (ISO 1043-4:2021/Amd 1:2026)
Ta slovenski standard je istoveten z: EN ISO 1043-4:2021/A1:2026
ICS:
01.075 Simboli za znake Character symbols
83.080.01 Polimerni materiali na Plastics in general
splošno
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 1043-4:2021/A1
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2026
EUROPÄISCHE NORM
ICS 83.040.30; 83.080.01
English Version
Plastics - Symbols and abbreviated terms - Part 4: Flame
retardants - Amendment 1: New code numbers for flame
retardants (ISO 1043-4:2021/Amd 1:2026)
Plastiques - Symboles et termes abrégés - Partie 4: Kunststoffe - Kennbuchstaben und Kurzzeichen - Teil
Ignifuges - Amendement 1: Nouveaux nombres-codes 4: Flammschutzmittel - Änderung 1 (ISO 1043-
(ISO 1043-4:2021/Amd 1:2026) 4:2021/Amd 1:2026)
This amendment A1 modifies the European Standard EN ISO 1043-4:2021; it was approved by CEN on 3 July 2025.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of
this amendment into the relevant 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 amendment 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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 1043-4:2021/A1:2026 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 1043-4:2021/A1:2026) 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 Amendment to the European Standard EN ISO 1043-4:2021 shall be given the status of a national
standard, either by publication of an identical text or by endorsement, at the latest by September 2026,
and conflicting national standards shall be withdrawn at the latest by September 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.
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 1043-4:2021/Amd 1:2026 has been approved by CEN as EN ISO 1043-4:2021/A1:2026
without any mod
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...