oSIST prEN 12122:2023
(Main)Chemicals used for treatment of water intended for human consumption - Ammonia solution
Chemicals used for treatment of water intended for human consumption - Ammonia solution
This European Standard is applicable to ammonia solution used for treatment of water intended for human consumption. It describes the characteristics and specifies the requirements of ammonia solution 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 ammonia solution (see Annex B).
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Ammoniaklösung
Diese Europäische Norm gilt für Ammoniaklösung zur Aufbereitung von Wasser für den menschlichen Gebrauch. Sie beschreibt die Eigenschaften von Ammoniaklösung, legt die Anforderungen an Ammoniaklö
sung fest und verweist auf die entsprechenden Analysenverfahren. Sie gibt Informationen für die Anwendung von Ammoniaklösung in der Wasseraufbereitung. Sie legt darüber hinaus Regeln für die sichere Handhabung und Benutzung von Ammoniaklösung fest (siehe AnhangB).
Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Ammoniaque
Le présent document s’applique à l’ammoniaque utilisée pour le traitement de l’eau destinée à consommation humaine. Il décrit les caractéristiques et spécifie les exigences relatives à l’ammoniaque, ainsi que les méthodes d’analyses 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’ammoniaque (voir l’Annexe B).
Kemikalije, ki se uporabljajo za pripravo pitne vode - Raztopina amonijaka
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 12122:2023
01-julij-2023
Nadomešča:
SIST EN 12122:2005
Kemikalije, ki se uporabljajo za pripravo pitne vode - Raztopina amonijaka
Chemicals used for treatment of water intended for human consumption - Ammonia
solution
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch -
Ammoniaklösung
Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation
humaine - Ammoniaque
Ta slovenski standard je istoveten z: prEN 12122
ICS:
13.060.20 Pitna voda Drinking water
71.100.80 Kemikalije za čiščenje vode Chemicals for purification of
water
oSIST prEN 12122:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 12122:2023
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oSIST prEN 12122:2023
DRAFT
EUROPEAN STANDARD
prEN 12122
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2023
ICS Will supersede EN 12122:2005
English Version
Chemicals used for treatment of water intended for human
consumption - Ammonia solution
Produits chimiques utilisés pour le traitement de l'eau Produkte zur Aufbereitung von Wasser für den
destinée à la consommation humaine - Ammoniaque menschlichen Gebrauch - Ammoniaklösung
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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12122:2023 E
worldwide for CEN national Members.
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prEN 12122:2023 (E)
Contents Page
European Foreword . 3
Introduction . 4
1 Scope . 5
2 Normative References . 5
3 Terms And Definitions . 5
4 Description . 5
5 Purity Criteria . 7
6 Test Methods . 8
7 Labelling – Transportation – Storage . 15
Annex A (Informative) General Information On Ammonia Solution . 18
Annex B (Normative) General Rules Relating To Safety . 19
Bibliography . 20
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prEN 12122:2023 (E)
European foreword
This document (prEN 12122:2023) 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 12122:2005.
In comparison with the previous edition EN 12122:2005, 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 7.2).
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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 European standard 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.
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1 Scope
This document is applicable to ammonia solution used for treatment of water intended for human
consumption. It describes the characteristics and specifies the requirements of ammonia solution 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 ammonia solution (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 3696:1987)
ISO 5993, Sodium hydroxide for industrial use — Determination of mercury content — Flameless atomic
absorption spectrometric method
ISO 6332, Water quality — Determination of iron — Spectrometric method using 1,10-phenanthroline
ISO 6353-1, Reagents for chemical analysis — Part 1: General test methods
ISO 7108, Ammonia solution for industrial use — Determination of ammonia content — Titrimetric method
ISO 7109, Ammonia solution for industrial use — Determination of residue after evaporation at 105 degrees
C — Gravimetric method
3 Terms and definitions
No terms and definitions are listed in this document.
4 Description
4.1 Identification
4.1.1 Chemical name
Ammonium hydroxide.
4.1.2 Synonym or common name
Ammonia solution.
4.1.3 Relative molecular mass
35,05.
4.1.4 Empirical formula
NH OH.
4
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4.1.5 Chemical formula
NH OH.
4
1)
4.1.6 CAS-Registry Number
1336-21-6.
2)
4.1.7 EINECS reference
215-647-6.
4.2 Commercial form
The product is a solution of mass fraction of 25 % of ammonia (NH3) in water.
4.3 Physical properties
4.3.1 Appearance and odour
The product is a colourless liquid with a pungent odour.
4.3.2 Density
The density of the product (a solution of a mass fraction of 25 % of NH3) is 0,9 g/ml at 20 °C.
4.3.3 Solubility
The product is miscible with water in any proportion.
4.3.4 Vapour pressure
The vapour pressure of the product is 44 kPa 3) at 21 °C.
3)
4.3.5 Boiling point at 100 kPa
The product releases ammonia gas as the temperature rises and it begins to evaporate at approximately
38 °C.
4.3.6 Crystallization point
The crystallization point of the product is approximately - 55 °C for a solution of mass fraction of 25 % of
NH3.
4.3.7 Specific heat
The specific heat of the product is 4,18 kJ/kg.K.
4.3.8 Viscosity, dynamic
The viscosity dynamic of the product is 1,12 mPa.s at 20 °C.
1)
Chemical Abstracts Service Registry Number.
2)
European Inventory of Existing Commercial Chemical Substances.
3)
100 kPa = 1 bar.
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4.3.9 Critical temperature
The critical temperature of the product is 132,5 °C (NH3 vapour above liquid).
4.3.10 Critical pressure
The critical pressure of the product is 11 250 kPa (NH3 vapour above liquid).
4.3.11 Physical hardness
Not applicable.
4.4 Chemical properties
Air/ammonia vapour mixtures in the range of volume fraction of 15 % to 30 % of NH3 form explosive
mixtures.
Ammonia solution reacts with acids to form ammonium salts.
It reacts with carbon dioxide, e.g. from air, to form carbonate.
5 Purity criteria
5.1 General
This document specifies the minimum purity requirements for ammonia solution used for the treatment
of water intended for human consumption. Limits are given for impurities commonly present in the
product. Depending on the raw material and the manufacturing process other impurities may be present
and, if so, this shall be notified to the user and when necessary to relevant authorities.
Users of this product should check the national regulations in order to clarify whether it is of appropriate
purity for treatment of water intended for human consumption, taking into account raw water quality,
required dosage, contents of other impurities and additives used in the product not stated in this product
standard.
Limits have been given for impurities and chemical parameters where these are likely to be present in
significant quantities from the current production process and raw materials. If the production process
or raw materials leads to significant quantities of impurities, by-products or additives being present, this
shall be notified to the user.
5.2 Composition of commercial product
The commercial product shall contain at least a mass fraction of 25 % of ammonia in water.
The product shall contain the stated concentration of NH3 within ± 5 %.
5.3 Impurities and main by-products
Due to the manufacturing process by-products are not relevant.
The product shall conform to the requirements specified in Table 1.
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Table 1 — Impurities
Impurity Limit in mg/kg
of the product
Residue after evaporation 30
Iron (Fe) 10
5.4 Chemical parameters
The product shall conform to the requirements specified in Table 2.
Table 2 — Chemical parameters
Parameter Limit
mg/kg of commercial
product
Antimony (Sb) max. 1
Arsenic (As) max. 5
Cadmium (Cd) max. 0,5
Chromium (Cr) max. 5
Lead (Pb) max. 5
Mercury (Hg) max. 0,1
Nickel (Ni) max. 5
Selenium (Se) max. 2
NOTE Pesticides and polycyclic aromatic hydrocarbons and
cyanides are not relevant in ammonia solution because the
raw materials used in the manufacturing are free of them.
For parametric values of ammonia solution on trace metal
content in drinking water, see [1].
6 Test methods
6.1 Sampling
6.1.1 General
Observe the general recommendations of ISO 3165 and take account of ISO 6206 and see [3].
6.1.2 Sampling from bulk containers
SAFETY PRECAUTIONS: Do not use compressed air to discharge ammonia solution from bulk containers.
Whenever it is necessary to take a sample of ammonia solution from a bulk container, cool the container
and vent it to the atmosphere before removing any stopper or cover. Take care to ensure that any
escaping ammonia gas is discharged at a point remote from personnel.
Withdraw samples from the tank by means of a sampling 'thief' made of 25 mm diameter polyethylene
or polypropylene tubing, 2 m long and tapered at each end to 10 mm diameter over a minimum of
100 mm tube length.
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Transfer samples taken from tanks immediately into clean glass screw-stoppered bottles, cool them
immediately and keep them in a cool place (e.g. cold water bath or fridge) until required for analysis.
Use the following procedure:
a) take two consecutive 500 ml samples and discard both in order to clear the sampling tube and bottle
and to obtain representative material;
b) take the sample required in a bottle fitted with an internal solid screw-stopper and rubber gasket.
Tighten the stopper as soon as the sample is in the bottle.
6.1.3 Sampling from drums, carboys and bottles
6.1.3.1 General
Do not use suction during the withdrawal of the sample, especially with concentrated solutions, since
reduction of pressure readily depletes the solution of ammonia gas.
6.1.3.2 Drums
SAFETY PRECAUTIONS: Do not use compressed air to discharge ammonia solution from drums.
Sample from drums by pouring, by siphoning or by means of a polyethylene or polypropylene sampling
'thief'. If the sample is to be obtained from pouring, use a specially constructed elevated platform to hold
the drum, and a screw-in pourer and funnel to facilitate transfer and reduce the risk from splashing.
If the sample is to be obtained by siphoning, use a suitable siphon constructed from stainless steel,
polyethylene, polypropylene or glass. Start the siphon by applying a slight air pressure to the drum, e.g.
from a hand bellows or bulb, provided that the end of the delivery tube is below the level of liquid in the
drum.
If a polyethylene or polypropylene sampling 'thief' is used to draw the sample, use the procedure
described in 6.1.2.
6.1.3.3 Carboys
SAFETY PRECAUTIONS: Do not use compressed air to discharge ammonia solution from carboys.
Sample from carboys by pouring, by siphoning, by the use of a polyethylene or polypropylene sampling
'thief” or by the use of a hand-operated pump.
If the sample is to be obtained by pouring, use a properly constructed carboy tilter.
If the sample is to be obtained from siphoning, use a suitable siphon constructed from stainless steel,
polyethylene, polypropylene or glass. Start the siphon by applying a slight air pressure to the carboy, e.g.
from a hand bellows or bulb, provided that the end of the delivery tube is below the level of liquid in the
carboy.
NOTE Polyethylene or polypropylene siphons incorporating bellows for priming are commercially available.
If a polyethylene or polypropylene sampling 'thief'
...
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