kSIST FprEN 15077:2025

SLOVENSKI STANDARD
oSIST prEN 15077:2024
01-julij-2024
Kemikalije, ki se uporabljajo za pripravo bazenske vode - Natrijev hipoklorit
Chemicals used for treatment of swimming pool water - Sodium hypochlorite
Produkte zur Aufbereitung von Schwimm- und Badebeckenwasser - Natriumhypochlorit
Produits chimiques utilisés pour le traitement de l’eau des piscines - Hypochlorite de
sodium
Ta slovenski standard je istoveten z: prEN 15077
ICS:
13.060.25 Voda za industrijsko uporabo Water for industrial use
71.100.80 Kemikalije za čiščenje vode Chemicals for purification of
water
oSIST prEN 15077:2024 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 15077:2024
oSIST prEN 15077:2024
DRAFT
EUROPEAN STANDARD
prEN 15077
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2024
ICS 71.100.80 Will supersede EN 15077:2013
English Version
Chemicals used for treatment of swimming pool water -
Sodium hypochlorite
Produits chimiques utilisés pour le traitement de l'eau Produkte zur Aufbereitung von Schwimm- und
des piscines - Hypochlorite de sodium Badebeckenwasser - Natriumhypochlorit
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 164.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15077:2024 E
worldwide for CEN national Members.

oSIST prEN 15077:2024
prEN 15077:2024 (E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Description . 5
4.1 Identification . 5
4.2 Commercial form . 6
4.3 Physical properties . 6
4.4 Chemical properties . 7
5 Purity criteria . 7
5.1 General. 7
5.2 Composition of commercial product . 7
5.3 Impurities and main by-products . 7
5.4 Chemical parameters. 8
6 Test methods . 8
7 Labelling – Transportation - Storage . 8
7.1 Means of delivery . 8
7.2 Labelling . 9
7.3 Transportation regulations and labelling . 10
7.4 Marking . 10
7.5 Storage . 10
Annex A (informative) General information on sodium hypochlorite . 11
Annex B (normative) General rules relating to safety . 12
Bibliography . 13

oSIST prEN 15077:2024
prEN 15077:2024 (E)
European foreword
This document (prEN 15077:2024) has been prepared by Technical Committee CEN/TC 164 “Water
supply”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 15077:2013.
prEN 15077:2024 includes the following significant technical changes with respect to EN 15077:2013:
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, adding the note “at least the name and type of the product shall be
clearly marked or displayed at viewing height on the means of delivery”.
oSIST prEN 15077:2024
prEN 15077:2024 (E)
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) 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 1 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. Local regulations and requirements can apply.
NOTE 2 This product is a biocide. At the time of publication, the EU legislation in force regarding biocides is
Regulation (EU) No 528 /2012 [1].
oSIST prEN 15077:2024
prEN 15077:2024 (E)
1 Scope
This document is applicable to sodium hypochlorite used directly or for the production of formulations
for treating swimming pool water. It describes the characteristics of sodium hypochlorite and specifies
the requirements and the corresponding test methods for sodium hypochlorite. It gives information on
its use for treating swimming pool water.
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 901, Chemicals used for treatment of water intended for human consumption — Sodium hypochlorite
3 Terms and definitions
No terms and definitions are listed in this document.
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/ui
• IEC Electropedia: available at https://www.electropedia.org/
4 Description
4.1 Identification
4.1.1 Chemical name
Sodium hypochlorite.
4.1.2 Synonym or commons name
Liquid bleach, soda bleach, bleach lye.
4.1.3 Relative molecular mass
74,44.
4.1.4 Empirical formula
NaClO.
4.1.5 Chemical formula
NaClO.
® 1
4.1.6 CAS-Registry Number
7681-52-9.
1 ®
The Chemical Abstracts Service Registry Number is a trademark of the American Chemical Society. This
information is given for the convenience of users of this document and does not constitute an endorsement of the
product named.
oSIST prEN 15077:2024
prEN 15077:2024 (E)
4.1.7 EINECS reference
231-668-3.
4.2 Commercial form
The product is supplied as an aqueous solution with an available (active) chlorine concentration up to a
mass fraction of 18 %. For safe handling and use and emergency procedures of sodium hypochlorite, refer
to Annex B.
4.3 Physical properties
4.3.1 Appearance and odour
The product is a clear yellowish-green solution with a faint chlorinous odour.
4.3.2 Density
The density of the product varies between 1,13 g/ml and 1,30 g/ml at 20 °C.
4.3.3 Solubility in water
The product is capable of being mixed with water in any proportion.
4.3.4 Vapour pressure
Approximately 2,5 kPa at 20 °C.
4.3.5 Boiling point at 100 kPa
Not applicable.
NOTE 100 kPa = 1 bar.
4.3.6 Crystallization and freezing point
At approximately −10 °C, crystallization of NaOCl.6H O starts.
Freezing of the concentrated product takes pla
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