SIST EN 15077:2026

SLOVENSKI STANDARD
01-maj-2026
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: EN 15077:2026
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 15077
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2026
EUROPÄISCHE NORM
ICS 71.100.80 Supersedes EN 15077:2013
English Version
Chemicals used for treatment of swimming pool and spas
water - Sodium hypochlorite
Produits chimiques utilisés pour le traitement de l'eau Produkte zur Aufbereitung von Schwimm- und
des piscines et des spas - Hypochlorite de sodium Badebeckenwasser - Natriumhypochlorit
This European Standard was approved by CEN on 26 January 2026.

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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 15077:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Description . 6
4.1 Identification . 6
4.1.1 Chemical name . 6
4.1.2 Synonym or commons name . 6
4.1.3 Relative molecular mass . 6
4.1.4 Empirical formula . 6
4.1.5 Chemical formula . 6 ®
4.1.6 CAS-Registry Number  . 6
4.1.7 EINECS reference . 7
4.2 Commercial form . 7
4.3 Physical properties . 7
4.3.1 Appearance and odour . 7
4.3.2 Density . 7
4.3.3 Solubility in water . 7
4.3.4 Vapour pressure . 7
4.3.5 Boiling point at 100 kPa . 7
4.3.6 Crystallization and freezing point . 7
4.3.7 Specific heat . 7
4.3.8 Viscosity (dynamic) . 7
4.3.9 Critical temperature . 7
4.3.10 Critical pressure . 7
4.3.11 Physical hardness . 7
4.4 Chemical properties . 8
5 Purity criteria . 8
5.1 General. 8
5.2 Composition of commercial product . 8
5.3 Impurities and main by-products . 8
5.4 Chemical parameters. 9
6 Test methods . 9
7 Labelling – Transportation - Storage . 9
7.1 Means of delivery . 9
7.2 Labelling . 10
7.3 Transportation regulations and labelling . 11
7.4 Marking . 11
7.5 Storage . 11
7.5.1 General. 11
7.5.2 Long-term stability . 11
7.5.3 Storage incompatibilities . 11
Annex A (informative) General information on sodium hypochlorite . 12
A.1 Origin . 12
A.1.1 Raw materials . 12
A.1.2 Manufacturing process . 12
A.2 Use . 12
A.2.1 Function . 12
A.2.2 Form in which the product is used . 12
A.2.3 Treatment dose . 12
A.2.4 Means of application. 12
A.2.5 Secondary effects . 12
A.2.6 Removal of excess product . 12
A.3 Factors influencing active chlorine decay and chlorate formation [4] . 13
A.3.1 Example shape of curves presenting the active chlorine decay vs. temperature and storage
time . 13
A.3.2 Example shape of curves presenting the chlorate formation vs. time and temperature . 14
A.3.3 Influence of initial active concentration vs. storage . 15
Annex B (normative) General rules relating to safety . 16
B.1 Rules for safe handling and use . 16
B.2 Emergency procedures . 16
B.2.1 First aid . 16
B.2.2 Spillage . 16
B.2.3 Fire . 16
Bibliography . 17

European foreword
This document (EN 15077:2026) 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 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.
This document supersedes 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”.
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, Türkiye 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) 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
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