EN 12126:2022

Chemicals used for treatment of water intended for human consumption - Liquefied ammonia

This document is applicable to liquefied ammonia used for treatment of water intended for human consumption. It describes the characteristics and specifies the requirements of liquefied ammonia and refers to the corresponding analytical methods. It gives information for its use in water treatment. It also determines the rules relating to the safe handling and use of liquefied ammonia (see Annex B).

Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Ammoniak, flüssig

Dieses Dokument ist anzuwenden für flüssiges Ammoniak zur Aufbereitung von Wasser für den menschlichen Gebrauch. Es beschreibt die Eigenschaften von flüssigem Ammoniak und legt die Anforderungen sowie die entsprechenden Prüfverfahren für flüssiges Ammoniak fest. Es enthält Angaben zu dessen Anwendung in der Wasseraufbereitung. Es legt darüber hinaus Regeln für die sichere Handhabung und Verwendung von flüssigem Ammoniak fest (siehe Anhang B).

Produits chimiques utilisés pour le traitement de l’eau destinée à la consommation humaine - Ammoniac liquéfié

Le présent document s’applique à l’ammoniac liquéfié utilisé pour le traitement de l’eau destinée à la consommation humaine. Il décrit les caractéristiques de l’ammoniac liquéfié, en spécifie les exigences ainsi que les méthodes d’analyse correspondantes. Il donne des informations pour son emploi dans le traitement de l’eau. Il fixe également les règles relatives à la sécurité d’emploi et de manipulation de l’ammoniac liquéfié (voir l’Annexe B).

Kemikalije, ki se uporabljajo za pripravo pitne vode - Salmiak

Ta dokument obravnava salmiak, ki se uporablja za pripravo pitne vode. Opisuje značilnosti salmiaka in določa zahteve zanj ter se sklicuje na ustrezne analizne metode. Podaja informacije za njegovo uporabo pri pripravi pitne vode. Določa tudi pravila za varno ravnanje s salmiakom in njegovo uporabo (glej dodatek B).

General Information

• Status: Published
• Publication Date: 26-Apr-2022
• Withdrawal Date: 30-Oct-2022
• ICS: 71.100.80 - Chemicals for purification of water
• Technical Committee: CEN/TC 164 - Water supply
• Drafting Committee: CEN/TC 164/WG 9 - Drinking water treatment
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 27-Apr-2022
• Due Date: 04-Dec-2021
• Completion Date: 27-Apr-2022
• Ref Project: SIST EN 12126:2022 - Chemicals used for treatment of water intended for human consumption - Liquefied ammonia

Relations

• Replaces: EN 12126:2012 - Chemicals used for treatment of water intended for human consumption - Liquefied ammonia
• Effective Date: 26-Jun-2019

Overview

EN 12126:2022 (CEN) specifies requirements for liquefied ammonia used for the treatment of water intended for human consumption. The standard describes the product identity, physical and chemical properties, minimum purity criteria, required analytical and sampling methods, and rules for safe handling, labelling, transportation and storage (see Annex B). EN 12126:2022 supersedes EN 12126:2012 and is intended for application across CEN member states.

Key topics and technical requirements

• Product identification: chemical name (anhydrous liquefied ammonia), CAS 7664-41-7, formula NH3, relative molecular mass 17.03.
• Physical properties: boiling point −33.4 °C (101.3 kPa), densities and solubility values, vapour pressures at specified temperatures are defined in the standard.
• Purity criteria: commercial liquefied ammonia shall contain at least 99.8% NH3 by mass. Specified impurity limits:
  • Water: max mass fraction 0.1%
  • Permanent gases and methane: max volume fraction 0.1%
  • Oil: max 5 mg/kg
• Analytical and sampling methods:
  • Sampling: ISO 7103
  • Water content (Karl Fischer): ISO 7105
  • Oil content (gravimetric/IR): ISO 7106
  • Permanent gases and methane: gas chromatography with thermal conductivity detection (method details provided)
  • Reference to EN ISO 3696 for water used in analyses
• Safety, labelling and transport: requirements for EU labelling, transport regulations and marking of product and accompanying documents; Annex B gives general rules for safe handling and use. The standard highlights chemical incompatibilities (e.g., halogens, acids, oxidizers) and explosion risk for 15–30% ammonia/air mixtures.

Applications and users

EN 12126:2022 is targeted at organizations involved with the supply, testing, handling and use of liquefied ammonia for potable water treatment, including:

• Water utilities and treatment plant operators
• Chemical manufacturers and distributors of liquefied ammonia
• Analytical and quality control laboratories
• Transporters, storage facility managers and health & safety officers
• Regulatory authorities and procurement teams seeking compliance with European product and safety requirements

Practical value: the standard helps ensure consistent product quality, accurate analytical testing, regulatory compliance, and safer handling to prevent contamination of drinking water and minimize operational and safety risks.

Related standards

• ISO 7103 - Sampling of liquefied anhydrous ammonia
• ISO 7105 - Determination of water (Karl Fischer)
• ISO 7106 - Determination of oil content
• EN ISO 3696 - Water for analytical laboratory use
• EN 12126:2012 - previous edition (superseded)

Keywords: EN 12126:2022, liquefied ammonia, water treatment, drinking water chemicals, purity criteria, sampling, gas chromatography, safety, labelling, transport, CEN.

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2022
Nadomešča:
SIST EN 12126:2013
Kemikalije, ki se uporabljajo za pripravo pitne vode - Salmiak
Chemicals used for treatment of water intended for human consumption - Liquefied
ammonia
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Ammoniak,
flüssig
Produits chimiques utilisés pour le traitement de l’eau destinée à la consommation
humaine - Ammoniac liquéfié
Ta slovenski standard je istoveten z: EN 12126:2022
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 12126
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2022
EUROPÄISCHE NORM
ICS 71.100.80 Supersedes EN 12126:2012
English Version
Chemicals used for treatment of water intended for human
consumption - Liquefied ammonia
Produits chimiques utilisés pour le traitement de l'eau Produkte zur Aufbereitung von Wasser für den
destinée à la consommation humaine - Ammoniac menschlichen Gebrauch - Ammoniak, flüssig
liquéfié
This European Standard was approved by CEN on 20 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 12126:2022 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 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. 7
6 Test methods . 8
6.1 Sampling . 8
6.2 Analyses. 8
7 Labelling – Transportation – Storage . 12
7.1 Means of delivery . 12
7.2 Labelling according to the EU legislation ) . 13
7.3 Transportation regulations and labelling . 15
7.4 Marking . 15
7.5 Storage . 15
Annex A (informative) General information on liquefied ammonia . 16
Annex B (normative) General rules relating to safety . 17
Bibliography . 18
European foreword
This document (EN 12126:2022) 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 12126:2012.
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;
c) use of the changed classification and labelling (see [2]).
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 liquefied ammonia used for treatment of water intended for human
consumption. It describes the characteristics and specifies the requirements of liquefied ammonia and
refers to the corresponding analytical methods. It gives information for its use in water treatment. It
also determines the rules relating to the safe handling and use of liquefied ammonia (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 ISO 3696, Water for analytical laboratory use - Specification and test methods (ISO 3696)
ISO 7103, Liquefied anhydrous ammonia for industrial use — Sampling — Taking a laboratory sample
ISO 7105, Liquefied anhydrous ammonia for industrial use — Determination of water content — Karl
Fischer method
ISO 7106, Liquefied anhydrous ammonia for industrial use — Determination of oil content — Gravimetric
and infra-red spectrometric methods
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 Identification
4.1.1 Chemical name
Ammonia liquefied, anhydrous.
4.1.2 Synonym or common name
Ammonia.
4.1.3 Relative molecular mass
17,03.
4.1.4 Empirical formula
NH .
4.1.5 Chemical formula
NH .
4.1.6 CAS Registry Number
7664-41-7.
4.1.7 EINECS reference
231-635-3.
4.2 Commercial form
The product is available as liquefied gas.
4.3 Physical properties
4.3.1 Appearance and odour
The product is colourless liquid with a characteristic pungent odour.
4.3.2 Density
The density of the gas is 0,771 g/l at 101,3 kPa and 0 °C.
The density of the liquid is 0,682 g/ml at 101,3 kPa and −34 °C, and 0,61 g/ml at 850 kPa and 20 °C.
4.3.3 Solubility (in water)
The solubility of the product in water is 900 g/l at 0 °C, 520 g/l at 20 °C, and 407 g/l at 30 °C.
4.3.4 Vapour pressure
The vapour pressure of the product is 400 kPa at 0 °C, 850 kPa at 20 °C and 2 035 kPa at 50 °C.
4.3.5 Boiling point at 100 kPa
The boiling point of the product is −33,4 °C at 101,3 kPa.
4.3.6 Melting point
The melting point of the product is −77,7 °C at 101,3 kPa.
4.3.7 Specific heat
The specific heat of the product is 4,61 kJ/(kg K) at 0 °C and 4,86 kJ/(kg K) at 40 °C.
4.3.8 Viscosity, dynamic
The viscosity of the product is 0,254 mPa s at −33 °C and 101,3 kPa.
4.3.9 Critical temperature
132,4 °C.
4.3.10 Critical pressure
11 450 kPa.
Chemical Abstracts Service Registry Number.
European Inventory of Existing Commercial Chemical Substances.
100 kPa = 1 bar.
4.3.11 Physical hardness
Not applicable.
4.4 Chemical properties
Ammonia reacts violently with halogens, acids, acid halides, acid anhydrides and oxidising agents. It
reacts with zinc, copper, tin and their alloys. Mixtures of volume fraction of 15 % to 30 % of ammonia
with air are explosive. For additional information on liquefied ammonia, see Annex A.
5 Purity criteria
5.1 General
This document specifies the minimum purity requirements for liquefied ammonia used for the
treatment of water intended for hum
...