SIST EN 15796:2022

Chemicals used for treatment of swimming pool water - Calcium hypochlorite

This document is applicable to calcium hypochlorite used directly, or for the production of formulations, for treatment of water for swimming pools. It describes the characteristics of calcium hypochlorite and specifies the requirements and the corresponding test methods for calcium hypochlorite. It gives information on its use in swimming pool water treatment. It also determines the rules relating to safe handling and use of calcium hypochlorite (see Annex B).

Produkte zur Aufbereitung von Schwimm-und Badebeckenwasser - Calciumhypochlorit

Dieses Dokument ist anzuwenden für Calciumhypochlorit, das direkt zur Aufbereitung von Schwimm- und Badebeckenwasser oder zur Herstellung von Zubereitungen für diesen Zweck verwendet wird. Es beschreibt die Eigenschaften von Calciumhypochlorit und legt die Anforderungen sowie die entsprechenden Prüf-verfahren für Calciumhypochlorit fest. Es enthält Angaben zu seiner Anwendung in der Aufbereitung von Schwimm- und Badebeckenwasser. Es legt darüber hinaus Regeln für die sichere Handhabung und Verwendung von Calciumhypochlorit fest (siehe Anhang B).

Produits chimiques utilisés pour le traitement de l'eau des piscines - Hypochlorite de calcium

Le présent document est applicable à l’hypochlorite de calcium utilisé directement ou pour la production de formulations pour le traitement de l’eau des piscines. Il décrit les caractéristiques de l’hypochlorite de calcium et spécifie les exigences et les méthodes d’essai correspondantes. Il donne des informations sur son emploi dans le traitement de l’eau des piscines. Il détermine également les règles relatives à la manipulation et à l’utilisation en toute sécurité de l’hypochlorite de calcium (voir l’Annexe B).

Kemikalije, ki se uporabljajo za pripravo bazenske vode - Kalcijev hipoklorit

Ta dokument obravnava kalcijev hipoklorit, ki se uporablja neposredno ali za izdelavo mešanic za pripravo bazenske vode. Opisuje značilnosti kalcijevega hipoklorita ter določa zahteve in ustrezne preskusne metode zanj. Podaja informacije za njegovo uporabo pri pripravi bazenske vode. Določa tudi pravila za varno ravnanje s kalcijevim hipokloritom in njegovo 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 15796:2022 - Chemicals used for treatment of swimming pool water - Calcium hypochlorite

Relations

• Replaces: SIST EN 15796:2010 - Chemicals used for treatment of swimming pool water - Calcium hypochlorite
• Effective Date: 01-Jul-2022

Overview

SIST EN 15796:2022 is a European standard developed by the European Committee for Standardization (CEN) that specifies the requirements and test methods for calcium hypochlorite used in the treatment of swimming pool water. This standard ensures the quality, purity, and safe handling of calcium hypochlorite products, either used directly or in formulations, improving water disinfection, oxidation, and overall pool hygiene.

Adopted by CEN members across EU and EFTA countries, SIST EN 15796:2022 updates and supersedes the previous EN 15796:2010, incorporating revised transportation, labelling, and safety requirements. The document is crucial for manufacturers, suppliers, and users to guarantee compliance with European safety and quality standards for swimming pool chemical treatment.

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Key Topics

• Scope and Application
  SIST EN 15796:2022 applies to calcium hypochlorite for swimming pool water treatment, detailing its physical and chemical characteristics alongside purity criteria.

• Purity and Composition
  The standard mandates a minimum active chlorine mass fraction of 65% in calcium hypochlorite products at delivery. It regulates limits on impurities such as arsenic, cadmium, chromium, mercury, lead, and bromates, ensuring the chemical's safety and effectiveness.

• Test Methods
  Sampling and testing methods conform with EN 900, ensuring consistent and reliable quality assessments of the calcium hypochlorite supplied.

• Labelling, Transportation, and Storage
  The standard specifies proper labelling following EU hazard communication guidelines, including danger pictograms and hazard statements related to oxidizing properties and toxicity. It mandates transportation classification under UN numbers 1748 or 2880 depending on product form, with instructions for safe packaging and storage to prevent accidental decomposition or reaction.

• Safety and Handling
  Annex B provides normative guidance for safe use, emphasizing never mixing calcium hypochlorite with organic chlorine compounds, clear first aid measures, and fire-fighting procedures recognizing that calcium hypochlorite supports combustion due to oxygen release during decomposition.

• Additional Information
  Annex A supplies background on calcium hypochlorite’s raw materials, manufacturing, and application methods, such as its use as an oxidizer and disinfectant in metered doses dissolved in water.

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Applications

Calcium hypochlorite, as specified in SIST EN 15796:2022, is primarily used for:

• Swimming Pool Water Disinfection
  Efficiently killing bacteria, viruses, and algae to maintain hygienic and safe swimming conditions.

• Oxidation of Contaminants
  Removal of ammonium compounds, sulfides, and oxidation of iron from pool water, improving water clarity and safety.

• pH and Chemical Balance
  Calcium hypochlorite causes slight pH increase and influences chloride levels, helping maintain optimal water conditions when properly dosed.

• Controlled Dosing
  Typically applied in dissolving tanks with metering pumps, doses tailor to pool water composition to achieve minimal residual free chlorine sufficient for microbial control.

• Wastewater and Industrial Water Treatment (indirect)
  While focused on swimming pool use, the standard's specifications can inform calcium hypochlorite use in broader water purification contexts requiring stringent purity.

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Related Standards

• EN 900:2021 – Covers calcium hypochlorite for water treatment for human consumption and provides essential test methods and purity requirements referenced by SIST EN 15796:2022.

• EU CLP Regulation (EC No 1272/2008) – Regulates classification, labelling, and packaging of chemical substances, foundational for hazard communication detailed in this standard.

• UN Recommendations on the Transport of Dangerous Goods – Provide the framework for safe transportation classifications referred in EN 15796 regarding calcium hypochlorite shipment.

• ISO 14001 – Environmental management practices may complement calcium hypochlorite handling and storage for sustainable and compliant pool water treatment operations.

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SIST EN 15796:2022 plays a critical role in ensuring that calcium hypochlorite used in swimming pool water treatment meets strict quality, safety, and regulatory requirements. Adoption helps reduce health risks, environmental impact, and enhances operational safety, making this standard essential for pool operators, chemical manufacturers, and regulatory authorities seeking reliable pool water disinfection solutions.

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2022
Nadomešča:
SIST EN 15796:2010
Kemikalije, ki se uporabljajo za pripravo bazenske vode - Kalcijev hipoklorit
Chemicals used for treatment of swimming pool water - Calcium hypochlorite
Produkte zur Aufbereitung von Schwimm-und Badebeckenwasser - Calciumhypochlorit
Produits chimiques utilisés pour le traitement de l'eau des piscines - Hypochlorite de
calcium
Ta slovenski standard je istoveten z: EN 15796:2022
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 15796
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2022
EUROPÄISCHE NORM
ICS 71.100.80 Supersedes EN 15796:2010
English Version
Chemicals used for treatment of swimming pool water -
Calcium hypochlorite
Produits chimiques utilisés pour le traitement de l'eau Produkte zur Aufbereitung von Schwimm-und
des piscines - Hypochlorite de calcium Badebeckenwasser - Calciumhypochlorit
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 15796:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and defintions . 5
4 Description . 5
5 Purity criteria . 5
5.1 General. 5
5.2 Composition of commercial product . 5
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 Risk and safety labelling according to the EU Directives [1] . 6
7.3 Transportation regulations and labelling . 8
7.4 Marking . 8
7.5 Storage . 9
Annex A (informative) General information on calcium hypochlorite . 10
Annex B (normative) General rules relating to safety . 11
Bibliography . 12

European foreword
This document (EN 15796:2022) 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 15796:2010.
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 must
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 7.2 on labelling.
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 for swimming pools, caused by the product
covered by this document:
d) 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;
e) 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 calcium hypochlorite used directly, or for the production of formulations,
for treatment of water for swimming pools. It describes the characteristics of calcium hypochlorite and
specifies the requirements and the corresponding test methods for calcium hypochlorite. It gives
information on its use in swimming pool water treatment. It also determines the rules relating to safe
handling and use of calcium hypochlorite (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 900, Chemicals used for treatment of water intended for human consumption - Calcium hypochlorite
3 Terms and defintions
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
— 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 900.
For additional information on calcium hypochlorite, see Ann
...