EN 15031:2022

SLOVENSKI STANDARD
01-julij-2022
Nadomešča:
SIST EN 15031:2014
Kemikalije, ki se uporabljajo za pripravo bazenske vode - Strjevanje na osnovi
aluminija
Chemicals used for treatment of swimming pool water - Aluminium based coagulants
Produkte zur Aufbereitung von Schwimm- und Badebeckenwasser - Flockungsmittel auf
Aluminiumbasis
Produits chimiques utilisés pour le traitement de l'eau des piscines - Coagulants à base
d'aluminium
Ta slovenski standard je istoveten z: EN 15031:2022
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 15031
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2022
EUROPÄISCHE NORM
ICS 71.100.80 Supersedes EN 15031:2013
English Version
Chemicals used for treatment of swimming pool water -
Aluminium based coagulants
Produits chimiques utilisés pour le traitement de l'eau Produkte zur Aufbereitung von Schwimm- und
des piscines - Coagulants à base d'aluminium Badebeckenwasser - Flockungsmittel auf
Aluminiumbasis
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 15031:2022 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
4.1 Aluminium sulfate . 5
4.2 Aluminium chloride (monomeric), aluminium chloride hydroxide (monomeric) and
aluminium chloride hydroxide sulfate (monomeric) . 8
4.3 Sodium aluminate . 11
4.4 Polyaluminium chloride hydroxide and polyaluminium chloride hydroxide sulfate . 13
5 Purity criteria . 16
5.1 General. 16
5.2 Composition of commercial product . 16
5.3 Impurities and main by-products . 17
5.4 Chemical parameters. 17
6 Test methods . 18
6.1 Sampling . 18
6.2 Analyses. 19
7 Labelling - transportation - storage . 19
7.1 Means of delivery . 19
7.2 Risk and safety labelling in accordance with the EU Directives . 19
7.3 Transportation regulations and labelling . 23
7.4 Marking . 25
7.5 Storage . 25
Annex A (informative) General information on aluminium based coagulants . 27
Annex B (normative) General rules relating to safety . 29
Bibliography . 30

European foreword
This document (EN 15031:2022) 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 15031:2013.
In comparison with the previous edition, the following technical modifications have been made:
— modification of 7.3 on transportation regulations and labelling, adding the sentence “The user shall
be aware of the incompatibilities between transported products.”;
— modification of 7.4 on marking. The requirements of marking are also applied to the accompanying
documents.
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
products covered by this document:
a) this document provides no information as to whether the products 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 these products remain in
force.
NOTE Conformity with this document does not confer or imply acceptance or approval of the products in any
of the Member States of the EU or EFTA. The use of the products covered by this document is subject to regulation
or control by National Authorities.
1 Scope
This document is applicable to aluminium based coagulants (aluminium sulfate, aluminium chloride
(monomeric), aluminium chloride hydroxide (monomeric), aluminium chloride hydroxide sulfate
(monomeric), sodium aluminate and polyaluminium chloride hydroxide and polyaluminium chloride
hydroxide sulfate) used directly or for the production of formulations for treatment of water for
swimming pools.
It describes the characteristics of aluminium based coagulants and specifies the requirements and the
corresponding test methods for aluminium based coagulants. It gives information on their use in
swimming pool water treatment. 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 1302, Chemicals used for treatment of water intended for human consumption - Aluminium-based
coagulants - Analytical methods
ISO 3165, Sampling of chemical products for industrial use — Safety in sampling
ISO 6206, Chemical products for industrial use — Sampling — Vocabulary
ISO 8213, Chemical products for industrial use — Sampling techniques — Solid chemical products in the
form of particles varying from powders to coarse lumps
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
— IEC Electropedia: available at https://www.electropedia.org/
4 Description
4.1 Aluminium sulfate
4.1.1 Identification
4.1.1.1 Chemical name
Aluminium sulfate.
4.1.1.2 Synonym or common names
Aluminium sulfate, cake alum, alum.
NOTE In English the generic term “alum” is imprecise and is deprecated and in German the term “Alaun” is
misleading.
4.1.1.3 Relative molecular mass
342,14 for Al (SO ) .
2 4 3
4.1.1.4 Empirical formula
Al (SO ) .
2 4 3
4.1.1.5 Chemical formula
Al (SO ) ·nH O.
2 4 3 2
4.1.1.6 CAS Registry Number
Al (SO ) : 10043–01–3.
2 4 3
Al (SO ) ·16 H O: 16828–11–8.
2 4 3 2
Al (SO ) ·18 H O: 7784–31–8.
2 4 3 2
4.1.1.7 EINECS reference
Al (SO ) : 233–135–0.
2 4 3
4.1.2 Commercial forms
Aluminium sulfate is available in solid hydrated forms, with different particle sizes (slabs, kibbled,
ground, granulated) and in aqueous solutions.
4.1.3 Physical properties
4.1.3.1 Appearance
The product is a white solid or colourless to yellow, clear liquid.
4.1.3.2 Density
The density of a typical aluminium sulfate solution is given in Table 1 and varies depending on the mass
fraction of the active matter (aluminium content), expressed in grams per kilogram of solution
(Al g/kg).
Table 1 — Density of solution
Aluminium concentration Density at 15 °C
g/kg of solution g/ml
40,8 1,310
41,6 1,315
42,5 1,320
43,3 1,325
44,2 1,330
45,0 1,335
Chemical Abstracts Service Registry Number.
European Inventory of Existing Commercial Chemical Substances.
4.1.3.3 Solubility
The theoretical limit of active matter content for a typical solution is given in Table 2.
Table 2 — Solubility
Temperature Active matter in Al
°C g/kg of solution
- 1 44,7
24 44,8
The practical limit of solubility depends on the temperature and the device used for solubilisation of the
solid form (slabs, kibbled, ground or granulated).
An indication of practical limits is given in Table 3.
Table 3 — Indication of practical limits of solubility
Temperature Active matter Al Solubility in grams solid form
(containing Al 90 g/kg of solid)
°C g/kg of solution
per kilogram of solution
15 37 410
4.1.3.4 Vapour pressure at 20 °C
Not known.
4.1.3.5 Boiling point at 100 kPa
Not known.
4.1.3.6 Crystallization point
The crystallization point of aluminium sulfate varies, depending on the concentration of the active
matter.
EXAMPLE – 7 °C for a typical solution of aluminium content of 42,4 g/kg of solution.
4.1.3.7 Specific heat
Not known.
4.1.3.8 Viscosity (dynamic)
The viscosity of aluminium sulfate solution varies greatly, depending on the concentration of the active
matter.
For a typical solution of aluminium content of 42,4 g/kg of solution, the viscosity is given in Table 4.

100 kPa = 1 bar.
Table 4
...