EN 1421:2022

SLOVENSKI STANDARD
01-julij-2022
Nadomešča:
SIST EN 1421:2013
Kemikalije, ki se uporabljajo za pripravo pitne vode - Amonijev klorid
Chemicals used for treatment of water intended for human consumption - Ammonium
chloride
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch -
Ammoniumchlorid
Produits chimiques utilisés pour le traitement de l’eau destinée à la consommation
humaine - Chlorure d’ammonium
Ta slovenski standard je istoveten z: EN 1421:2022
ICS:
13.060.20 Pitna voda Drinking water
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 1421
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2022
EUROPÄISCHE NORM
ICS 71.100.80 Supersedes EN 1421:2012
English Version
Chemicals used for treatment of water intended for human
consumption - Ammonium chloride
Produits chimiques utilisés pour le traitement de l'eau Produkte zur Aufbereitung von Wasser für den
destinée à la consommation humaine - Chlorure menschlichen Gebrauch - Ammoniumchlorid
d'ammonium
This European Standard was approved by CEN on 13 March 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 1421:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Description . 7
4.1 Identification . 7
4.2 Commercial form . 7
4.3 Physical properties . 7
4.4 Chemical properties . 8
5 Purity criteria . 9
5.1 General. 9
5.2 Composition of commercial product . 9
5.3 Impurities and main by-products . 9
Table 1 — Impurities . 9
5.4 Chemical parameters. 10
Table 2 — Chemical parameters . 10
6 Test methods . 10
6.1 Sampling . 10
6.2 Analyses. 10
7 Labelling – Transportation – Storage . 12
7.1 Means of delivery . 12
7.2 Labelling according to the EU legislation . 12
7.3 Transportation regulations and labelling . 13
7.4 Marking . 13
7.5 Storage . 13
Annex A (informative) General information on ammonium chloride . 14
A.1 Origin . 14
A.1.1 Raw materials . 14
A.1.2 Manufacturing process . 14
A.2 Use . 14
A.2.1 Function . 14
A.2.2 Form in which it is used . 14
A.2.3 Treatment dose . 14
A.2.4 Means of application . 14
A.2.5 Secondary effects . 14
A.2.6 Removal of excess product . 14
Annex B (normative) General rules relating to safety . 15
B.1 Rules for safe handling and use . 15
B.2 Emergency procedures . 15
B.2.1 First aid . 15
B.2.2 Spillage . 15
B.2.3 Fire . 15
Bibliography . 16
European foreword
This document (EN 1421:2022) 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 October 2022, and conflicting national standards shall
be withdrawn at the latest by October 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 1421:2012.
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.
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 (see Annex A).
1 Scope
This document is applicable to ammonium chloride used for treatment of water intended for human
consumption. It describes the characteristics and specifies the requirements of ammonium chloride and
refers to the corresponding analytical methods. It gives information for its use in water treatment. It
also determines the rules relating to safe handling and use of ammonium chloride (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 1233, Water quality - Determination of chromium - Atomic absorption spectrometric methods
EN ISO 3696, Water for analytical laboratory use - Specification and test methods (ISO 3696)
EN ISO 11885, Water quality - Determination of selected elements by inductively coupled plasma optical
emission spectrometry (ICP-OES) (ISO 11885)
EN ISO 12846, Water quality - Determination of mercury - Method using atomic absorption spectrometry
(AAS) with and without enrichment (ISO 12846)
ISO 17378-2, Water quality — Determination of arsenic and antimony — Part 2: Method using hydride
generation atomic absorption spectrometry (HG-AAS)
ISO 2762, Hydrochloric acid for industrial use — Determination of soluble sulphates — Turbidimetric
method
ISO 3332, Ammonium sulphate for industrial use — Determination of ammoniacal nitrogen content —
Titrimetric method after distillation
ISO 6332, Water quality — Determination of iron — Spectrometric method using 1,10-phenanthroline
ISO 8213, Chemical products for industrial use — Sampling techniques — Solid chemical products in the
form of particles varying from powders to coarse lumps
ISO 8288:1986, Water quality — Determination of cobalt, nickel, copper, zinc, cadmium and
...