SIST EN 15797:2022

Chemicals used for the treatment of swimming pool water - Iron based coagulants

This document is applicable to iron based coagulants (iron (III) chloride, iron (III) chloride sulfate and iron (III) sulfate liquid) used directly or for the production of formulations for treatment of water for swimming pools.
It describes the characteristics of iron based coagulants and specifies the requirements and the corresponding test methods for iron based coagulants. It gives information on their use in swimming pool water treatment. General information on iron based coagulants is given in Annex A.
It also determines the rules relating to safe handling and use (see Annex B).

Produkte zur Aufbereitung von Schwimm- und Badebeckenwasser - Flockungsmittel auf Eisenbasis

Dieses Dokument ist anzuwenden für Flockungsmittel auf Eisenbasis (Eisen(III)chlorid, Eisen(III)chloridsulfat und Eisen(III)sulfat, flüssig), die direkt zur Aufbereitung von Schwimm  und Badebeckenwasser oder zur Herstellung von Zubereitungen für diesen Zweck verwendet werden.
Es beschreibt die Eigenschaften von Flockungsmitteln auf Eisenbasis und legt die Anforderungen sowie die entsprechenden Prüfverfahren für Flockungsmittel auf Eisenbasis fest. Es enthält Angaben zu deren Anwendung in der Aufbereitung von Schwimm  und Badebeckenwasser. Allgemeine Angaben zu Flockungsmitteln auf Eisenbasis sind in Anhang A enthalten.
Es legt darüber hinaus Regeln für die sichere Handhabung und Verwendung fest (siehe Anhang B).

Produits chimiques utilisés pour le traitement de l’eau des piscines - Coagulants à base de fer

Le présent document est applicable aux coagulants à base de fer (chlorure de fer (III), chlorosulfate de fer (III) et sulfate de fer (III) liquide) utilisés directement ou pour la production de formulations pour le traitement de l’eau des piscines.
Il décrit les caractéristiques des coagulants à base de fer et spécifie les exigences et les méthodes d’essai correspondantes. Il donne des informations pour leur emploi dans le traitement de l’eau des piscines. Des informations générales sur les coagulants à base de fer sont fournies dans l’Annexe A.
Il fixe également les règles relatives à la sécurité d’emploi et de manipulation (voir l’Annexe B).

Kemikalije, ki se uporabljajo za pripravo bazenske vode - Strjevanje na osnovi železa

Ta dokument se uporablja za sredstva za strjevanje na osnovi železa (železov (III) klorid, železov (III) klorid sulfat in železov (III) sulfat v tekočem stanju), ki se uporabljajo neposredno ali za izdelavo mešanic za pripravo bazenske vode.
Opisuje značilnosti sredstev za strjevanje na osnovi železa ter določa zahteve in ustrezne preskusne metode zanje. Vsebuje informacije za uporabo sredstev za strjevanje na osnovi aluminija pri pripravi bazenske vode. Splošne informacije o sredstvih za strjevanje na osnovi železa so podane v dodatku A.
Določa tudi predpise za varno ravnanje in uporabo (glej dodatek B).

General Information

• Status: Published
• Public Enquiry End Date: 19-Jul-2020
• Publication Date: 09-Jun-2022
• ICS: 13.060.25 - Water for industrial use
• ICS: 71.100.80 - Chemicals for purification of water
• Technical Committee: IOVO - Water supply and waste water engineering
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 09-Jun-2022
• Due Date: 14-Aug-2022
• Completion Date: 10-Jun-2022
• Ref Project: EN 15797:2022 - Chemicals used for the treatment of swimming pool water - Iron based coagulants

Relations

• Replaces: SIST EN 15797:2010 - Chemicals used for the treatment of swimming pool water - Iron based coagulants
• Effective Date: 01-Jul-2022

Overview

EN 15797:2022 is the CEN (European) standard that specifies requirements for iron‑based coagulants used in the treatment of swimming pool water. It applies to ferric materials commonly marketed as iron (III) chloride (ferric chloride), iron (III) chloride sulfate and iron (III) sulfate (ferric sulfate) liquid, whether used directly or as ingredients in formulations. The standard describes product characteristics, purity criteria, required test methods and provides guidance on labelling, transport, storage and safe handling (Annexes A and B).

Key topics and requirements

• Scope and product types: ferric chloride (solid, hexahydrate, solutions), ferric sulfate solution, and ferric chloride sulfate solutions.
• Purity and composition:
  • Active iron content must be within ±3% of the manufacturer’s declared mass fraction.
  • Typical commercial concentrations cited: ferric chloride (anhydrous ≈ 99% FeCl3; hexahydrate ≈ 59% FeCl3; liquid ≈ 40%), ferric sulfate solution (≈ 30%), ferric chloride sulfate solution (≈ 36.9%).
• Impurities and heavy metals: limits for manganese, iron(II), insolubles and trace elements (As, Cd, Cr, Hg, Ni, Pb, Sb, Se) are defined by reference to EN 888 / EN 890 / EN 891 as applicable.
• Analytical and sampling methods: testing and sampling procedures are specified by EN 17215.
• Labelling, transport and storage:
  • Packaging: solids in suitable paper/plastic bags; liquids in corrosion‑resistant containers.
  • Hazard classifications and example labelling include GHS pictograms and hazard statements such as H290, H302, H315, H317, H318 (note: some statements depend on nickel content).
  • Suppliers must provide a safety data sheet (SDS) in the national language per REACH (EC) No 1907/2006, Annex II.
• Safety and handling: Annex B sets out emergency procedures, incompatibilities and safe handling rules.

Practical applications and users

EN 15797:2022 is useful for:

• Chemical manufacturers and formulators producing iron‑based coagulants for pool water.
• Pool operators and facility managers specifying or assessing coagulant quality and safety.
• Water treatment product suppliers and procurement teams requiring compliance evidence.
• Testing laboratories conducting conformity analyses to EN 17215 methods.
• Regulators and health & safety officers enforcing labelling, transport and storage rules.

By following EN 15797:2022, stakeholders can ensure consistent product quality, meet regulatory labelling/packaging expectations, and implement safe handling practices for iron‑based coagulants in swimming pool water treatment.

Related standards

• EN 888, EN 890, EN 891 - product‑specific purity/requirements for ferric coagulants
• EN 17215 - sampling and analytical methods
• REACH (EC) No 1907/2006 - SDS and regulatory obligations

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2022
Nadomešča:
SIST EN 15797:2010
Kemikalije, ki se uporabljajo za pripravo bazenske vode - Strjevanje na osnovi
železa
Chemicals used for the treatment of swimming pool water - Iron based coagulants
Produkte zur Aufbereitung von Schwimm- und Badebeckenwasser - Flockungsmittel auf
Eisenbasis
Produits chimiques utilisés pour le traitement de l’eau des piscines - Coagulants à base
de fer
Ta slovenski standard je istoveten z: EN 15797:2022
ICS:
13.060.25 Voda za industrijsko uporabo Water for industrial use
71.100.80 Kemikalije za čiščenje vode Chemicals for purification of
water
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 15797
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2022
EUROPÄISCHE NORM
ICS 71.100.80 Supersedes EN 15797:2010
English Version
Chemicals used for the treatment of swimming pool water
- Iron based coagulants
Produits chimiques utilisés pour le traitement de l'eau Produkte zur Aufbereitung von Schwimm- und
des piscines - Coagulants à base de fer Badebeckenwasser - Flockungsmittel auf Eisenbasis
This European Standard was approved by CEN on 20 April 2022.

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, 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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 15797:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Description . 5
5 Purity criteria . 5
5.1 General. 5
5.2 Composition of commercial product . 6
5.3 Impurities and main by-products . 6
5.4 Chemical parameters. 6
6 Test methods . 6
7 Labelling - Transportation - Storage . 6
7.1 Means of delivery . 6
7.2 Labelling according to the EU legislation . 7
7.3 Transportation regulations and labelling . 11
7.3.1 General. 11
7.3.2 Iron (III) chloride . 11
7.3.3 Iron (III) sulfate liquid . 11
7.3.4 Iron (III) chloride sulfate . 11
7.4 Marking . 11
7.5 Storage . 12
7.5.1 Long term stability . 12
7.5.2 Storage incompatibilities . 12
Annex A (informative) General information on iron based coagulants . 14
A.1 Origin . 14
A.2 Use . 14
Annex B (normative) General rules relating to safety . 15
B.1 Rules for safe handling and use . 15
B.2 Emergency procedures . 15
Bibliography . 16

European foreword
This document (EN 15797:2022) has been prepared by Technical Committee CEN/TC 164 “Water
supply”, the secretariat of which is held by AFNOR.
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 December 2022, and conflicting national standards
shall be withdrawn at the latest by December 2022.
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 15797:2010.
In comparison with the previous edition, the following technical modifications have been made:
a) modification of 7.3 on transportation regulations and labelling, adding the sentence “The user shall
be aware of the incompatibilities between transported products.”;
b) modification of 7.4 on marking. The requirements of marking are also applied to the accompanying
documents;
c) update of bibliography;
d) update of 7.2 according to EN 888, EN 890 and EN 891;
e) update of Clause 6.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations 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, Turkey and the United
Kingdom.
Introduction
In respect of potential adverse effects on the quality of water intended for human consumption caused
by the product covered by this document:
a) this document provides no information as to whether the product may be used without restriction
in any of the Member States of the EU or EFTA;
b) it should be noted that, while awaiting the adoption of verifiable European criteria, existing national
regulations concerning the use and/or the characteristics of this product remain in force.
NOTE Conformity with this document does not confer or imply acceptance or approval of the product in any of
the Member States of the EU or EFTA. The use of the product covered by this document is subject to regulation or
control by National Authorities.
1 Scope
This document is applicable to iron based coagulants (iron (III) chloride, iron (III) chloride sulfate and
iron (III) sulfate liquid) used directly or for the production of formulations for treatment of water for
swimming pools.
It describes the characteristics of iron based coagulants and specifies the requirements and the
corresponding test methods for iron based coagulants. It gives information on their use in swimming pool
water treatment. General information on iron based coagulants is given in Annex A.
It also determines the rules relating to safe handling and use (see Annex B).
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.
EN 888, Chemicals used for treatment of water intended for human consumption - Iron (III) chloride
EN 890, Chemicals used for treatment of water intended for human consumption - Iron (III) sulfate solution
EN 891, Chemicals used for treatment of water intended for human consumption - Iron (III) chloride sulfate
EN 17215, Chemicals used for treatment of water intended for human consumption - Iron-based coagulants
- Analytical methods
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/ui
— IEC Electropedia: available at https://www.electropedia.org/
4 Description
For the identification, the commercial form, the physical properties and the chemical properties see the
relevant subclauses of EN 888, EN 890 and EN 891.
5 Purity criteria
5.1 General
This document specifies the minimum purity requirements for iron based coagulants used for the
treatment of swimming pool water. Limits are given for impurities commonly present in the product.
Depending on the raw material and the manufacturing process, other impurities can be present and, if so,
this shall be notified to the user and when necessary to relevant authorities.
Users of this product should check the national regulations in order to clarify whether it is of appropriate
purity for treatment of swimming pool water, taking into account raw water quality, required dosage,
contents of other impurities and additives used in the products not stated in this document.
Limits have been given for impurities and chemicals parameters where these are likely to be present in
significant quantities from the current production process and raw materials. If the production process
or raw materials lead to significant quantities of impurities, by-products or additives being present, this
shall be notified to the user.
5.2 Composition of commercial product
The concentration of active matter in the product expressed as mass fraction in % of FeCl3,
...