oSIST prEN 15030:2020

Chemicals used for treatment of water intended for human consumption - Silver salts for intermittent use

This European Standard is applicable to silver nitrate and silver sulfate and silver chloride for the preservation of water intended for human consumption in intermittent applications in:
-   water supply plants, including their pipeline networks (small-size plants);
-   water for the preparation of foodstuffs;
-   water which is stored in packaged form or kept in enclosed systems (for example, water supply systems in land, water and airborne vehicles).
The purpose of adding silver salts is to prevent the detrimental proliferation of microorganisms in water during storage or in enclosed supply systems.
This European Standard describes the characteristics of silver salts, specifies the requirements for silver salts and gives reference to the analytical methods. It gives information on their use in water treatment. It also determines the rules relating to safe handling and use of silver salts (see Annex B).

Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Silbersalze für den nicht systematischen Gebrauch

Dieses Dokument gilt für Silbernitrat, Silbersulfat und Silberchlorid zur Konservierung von Wasser für den menschlichen Gebrauch bei nicht systematischen Anwendungen:
-   in Wasserversorgungsanlagen einschließlich deren Leitungsnetzen (Kleinanlagen);
-   für die Konservierung von Wasser für die Lebensmittelzubereitung;
-   für die Konservierung von sonstigem Wasser, das in abgepackter Form gelagert wird oder in geschlossenen Systemen (wie z. B. Wasserversorgungssysteme von Land , Wasser  und Luftfahrzeugen) geführt wird.
Durch den Zusatz von Silbersalzen soll eine nachteilige Vermehrung von Mikroorganismen im Wasser während der Lagerung bzw. innerhalb der geschlossenen Versorgungssysteme verhindert werden.
Dieses Dokument beschreibt die Eigenschaften von Silbersalzen, legt die Anforderungen an Silbersalze fest und verweist auf die entsprechenden Analysenverfahren. Es enthält Angaben zu deren Anwendung in der Wasseraufbereitung. Es legt darüber hinaus Regeln für die sichere Handhabung und Verwendung von Silbersalzen fest (siehe Anhang B).

Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Sels d'argent pour usage intermittent

Le présent document est applicable au nitrate d'argent, au sulfate d'argent et au chlorure d'argent pour la conservation de l'eau destinée à la consommation humaine pour usage intermittent dans :
-   les usines d'alimentation en eau, y compris leur réseau de canalisation (usines de petite taille) ;
-   l'eau destinée à la préparation des denrées alimentaires ;
-   l'eau stockée sous emballage ou conservée en circuit fermé (exemple, les systèmes de distribution d'eau dans les véhicules terrestres, nautiques et aériens).
L'ajout des sels d'argent a pour but d'empêcher la prolifération préjudiciable de micro-organismes dans l'eau pendant le stockage ou dans les circuits de distribution fermés.
Le présent document décrit les caractéristiques des sels d'argent et en spécifie les exigences ainsi que les méthodes d'analyse correspondantes. Il donne des informations pour leur emploi dans le traitement de l’eau. Il fixe également les règles relatives à la sécurité de manipulation et d’utilisation des sels d’argent (voir Annexe B).

Kemikalije, ki se uporabljajo za pripravo pitne vode - Srebrove soli za uporabo z občasnimi prekinitvami

General Information

• Status: Not Published
• Public Enquiry End Date: 19-Jun-2020
• ICS: 13.060.20 - Drinking water
• ICS: 71.100.80 - Chemicals for purification of water
• Technical Committee: IOVO - Water supply and waste water engineering
• Current Stage: 98 - Abandoned project (Adopted Project)
• Start Date: 18-Apr-2024
• Due Date: 23-Apr-2024
• Completion Date: 18-Apr-2024
• Ref Project: prEN 15030 - Chemicals used for treatment of water intended for human consumption - Silver salts for intermittent use

Relations

• Revised: SIST EN 15030:2013+A1:2015 - Chemicals used for treatment of water intended for human consumption - Silver salts for intermittent use
• Effective Date: 18-Jan-2023
• Revised: SIST EN 15030:2013+A1:2015 - Chemicals used for treatment of water intended for human consumption - Silver salts for intermittent use
• Effective Date: 01-Jul-2020

Overview

oSIST prEN 15030:2020 is a European standard that specifies requirements and guidance for the use of silver salts-specifically, silver nitrate, silver sulfate, and silver chloride-in the treatment of water intended for human consumption. Developed by the Slovenian Institute for Standardization (SIST) and under the European Committee for Standardization (CEN/TC 164), this standard addresses the preservation of drinking water through intermittent applications of silver salts. Its primary aim is to prevent the growth of harmful microorganisms in water during storage and in enclosed supply systems.

Silver salts are suitable for use in:

• Small water supply plants and their networks
• Water used in the preparation of foodstuffs
• Water stored in packages or enclosed systems such as those found in land, water, or airborne vehicles

This standard details the properties, purity requirements, safe handling, and correct application methods for silver salts in water treatment.

Key Topics

• Silver Nitrate, Silver Sulfate, and Silver Chloride: The standard covers the characterization, commercial form, physical and chemical properties, and minimum purity of these chemicals.
• Intermittent Application: Outlines when and how to use silver salts for occasional water preservation rather than continuous dosing.
• Microbiological Protection: Focus on preventing microorganism proliferation during storage or low-use periods.
• Safety and Handling: Guidance on labelling, transportation, proper storage, and first aid in case of exposure or spillage.
• Analytical Methods: References to standard test methods for verifying product purity and quality, including monitoring impurities and trace metals.
• Environmental Precautions: Recommendations for minimizing environmental impact and adhering to health and safety regulations in laboratories.

Applications

oSIST prEN 15030:2020 is applicable across several practical scenarios in the field of water treatment:

• Small-Scale Water Supply Systems: Ideal for plants with limited infrastructure or for emergency response situations where water storage is necessary.
• Food and Beverage Preparation: Ensures water remains safe and microbiologically stable for processes involving human consumption.
• Packaged and Mobile Water Storage: Suitable for bottled water, storage tanks, and enclosed supply systems on vehicles where intermittent treatment is effective.
• Emergency Water Preservation: Can be used in situations requiring water stabilization, such as disaster relief or reserve supplies.

The primary benefit lies in improved water safety where full-scale continual disinfection is not practical, ensuring compliance with public health standards and reducing the risk of microbial contamination.

Related Standards

The implementation and verification of this standard may require alignment with several other key standards and regulations:

• EN 973: Sodium chloride for regeneration of ion exchangers, relevant for solutions involving silver salts.
• EN ISO 10304-1, EN ISO 11885, EN ISO 12846: Analytical test methods for determining impurities and trace elements.
• EN 1233, EN ISO 3696, ISO 3165: Test methods and safety in sampling chemical products.
• EU Regulation (No 528/2012): Biocidal products legislation.
• Directive 98/83/EC: Drinking water quality requirements.
• Regulation (EC) No 1272/2008: Classification, labelling, and packaging of chemicals (CLP).

Adhering to oSIST prEN 15030:2020 ensures that the use of silver salts for drinking water preservation meets current European safety, quality, and regulatory benchmarks, supporting both public health and operational effectiveness in water treatment applications.

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2020
Kemikalije, ki se uporabljajo za pripravo pitne vode - Srebrove soli za uporabo z
občasnimi prekinitvami
Chemicals used for treatment of water intended for human consumption - Silver salts for
intermittent use
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Silbersalze für
den nicht systematischen Gebrauch
Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation
humaine - Sels d'argent pour usage intermittent
Ta slovenski standard je istoveten z: prEN 15030
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.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2020
ICS 71.100.80 Will supersede EN 15030:2012+A1:2015
English Version
Chemicals used for treatment of water intended for human
consumption - Silver salts for intermittent use
Produits chimiques utilisés pour le traitement de l'eau Produkte zur Aufbereitung von Wasser für den
destinée à la consommation humaine - Sels d'argent menschlichen Gebrauch - Silbersalze für den nicht
pour usage intermittent systematischen Gebrauch
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, Turkey 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
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15030:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
4.1 Identification . 6
4.2 Commercial form . 7
4.3 Physical properties . 7
4.4 Chemical properties . 8
5.1 General. 8
5.2 Composition of commercial products . 9
5.3 Impurities and main by-products . 9
5.4 Chemical parameters. 10
6.1 Sampling . 10
6.2 Analyses. 10
7.1 Means of delivery . 12
)
7.2 Labelling in accordance with the EU legislation . 13
7.3 Transportation regulations and labelling . 14
7.4 Marking . 15
7.5 Storage . 15
Annex A (informative) General information on silver salts . 16
Annex B (normative) General rules relating to safety . 18
Annex C (informative) Environmental, health and safety precautions within the chemical
laboratory . 19
Bibliography . 20

European foreword
This document (prEN 15030:2020) 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 15030:2012+A1:2015.
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 must
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.
prEN 15028:2020 (E)
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 1 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.
NOTE 2 These products are used as biocides and comply with the relevant legislation in force. In the European
Union, at the time of publication, this legislation is Regulation (EU) No 528/2012 [1].
Water which is to be preserved with silver ions should fulfil the relevant legal requirements before the
silver salt is added, in particular microbiological requirements.
1 Scope
This document is applicable to silver nitrate and silver sulfate and silver chloride for the preservation of
water intended for human consumption in intermittent applications in:
— water supply plants, including their pipeline networks (small-size plants);
— water for the preparation of foodstuffs;
— water which is stored in packaged form or kept in enclosed systems (for example, water supply
systems in land, water and airborne vehicles).
The purpose of adding silver salts is to prevent the detrimental proliferation of microorganisms in
water during storage or in enclosed supply systems.
This document describes the characteristics of silver salts, specifies the requirements for silver salts
and gives reference to the analytical methods. It gives information on their use in water treatment. It
also determines the rules relating to safe handling and use of silver salts (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 5961, Water quality - Determination of cadmium by atomic absorption spectrometry (ISO 5961)
EN ISO 10304-1, Water quality - Determination of dissolved anions by liquid chromatography of ions -
Part 1: Determination of bromide, chloride, fluoride, nitrate, nitrite, phosphate and sulfate (ISO 10304-1)
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 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
ISO 8288:1986, Water quality - Determination of cobalt, nickel, copper, zinc, cadmium and lead - Flame
atomic absorption spectrometric methods
ISO 17378-2, Water quality - Determination of arsenic and antimony - Part 2: Method using hydride
generation atomic absorption spectrometry (HG-AAS)
ISO/TS 17379-2, Water quality - Determination of selenium - Part 2: Method using hydride generation
atomic absorption spectrometry (HG-AAS)
prEN 15028:2020 (E)
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:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
4 Description
4.1 Identification
4.1.1 Chemical name
a) Silver nitrate;
b) silver sulfate;
c) silver chloride.
4.1.2 Synonym or common names
The naturally occurring mineral is called chlorargyrite or cerargirite, if weathered by air named as horn
silver.
4.1.3 Relative molecular mass
a) 169,87;
b) 311,97;
c) 143,23.
4.1.4 Empirical formula
a) AgNO ;
b) Ag SO ;
2 4
c) AgCl.
4.1.5 Chemical formula
a) AgNO ;
b) Ag SO ;
2 4
c) AgCl.
1)
4.1.6 CAS Registry Number
a) 7761-88-8;
1) Chemical Abstracts Service Registry Number.
b) 10294-26-5;
c) 7783-90-6.
2)
4.1.7 EINECS reference
a) 231-853-9;
b) 233-653-7;
c) 232-033-3.
4.2 Commercial form
The products are solids, available as powders or pelletized.
For safe handling and use and emergency procedures of silver salts, refer to normative Annex B. For the
minimization of environmental impacts caused by the use of the methods of analysis, a list of advice is
given for information in Annex C.
4.3 Physical properties
4.3.1 Appearance
White to slightly grey or yellowish.
NOTE Silver chloride quickly darkens on exposure to light by disintegrating into elemental chlorine and
metallic silver; the latter is responsible for the colour change.
4.3.2 Density
a) 4,35 g/cm (crystal density);
b) 5,45 g/cm (crystal density);
c) 5,56 g/cm (crystal density).
4.3.3 Solubility (in water)
a) 2,16 g/l;
b) 8 g/l;
c) 1,88 mg/l at 25 °C.
4.3.4 Vapour pressure at 20 °C
Not applicable.
3)
4.3.5 Boiling point at 100 kPa
a) 444 °C (decomposition);
b) 1 085 °C (decomposition);
2) European Inventory of Existing Commercial Chemical Substances.
3) 100 kPa = 1 bar.
prEN 15028:2020 (E)
c) 1 550 °C.
4.3.6 Melting point
a) 212 °C;
b) 652 °C;
c) 455 °C.
4.3.7 Specific heat
Not known.
4.3.8 Viscosity (dynamic)
Not applicable.
4.3.9 Critical temperature
Not applicable.
4.3.10 Critical pressure
Not applicable.
4.3.11 Physical hardness
Not applicable.
4.4 Chemical properties
a) silver nitrate in solution is almost neutral (the pH value of an aqueous solution at 100 g/l is
approximately 6);
b) silver sulfate in solution is almost neutral (the pH value of an aqueous solution at 5 g/l is
approximately 5 to 6);
c) the saturated aqueous solution (see 4.3.3) is pH neutral. Silver chloride is insoluble in alcohol, other
organic solvents, dilute acids and concentrated nitric acid, but soluble in concentrated sulphuric
acid and (depending on the individual concentration) in aqueous solutions of ammonia, chlorides,
bromides, thiosulfates and cyanides under complexation of the silver ion.
0 +
The standard redox potential (E ) of Ag /Ag in neutral aqueous solution at 25 °C is: E° = +0,80 V.
The standard redox potential (E ) of AgCl/Ag in neutral solution at 25 °C is: E° = +0,22 V.
For additional information on silver salts, see Annex A.
5 Purity criteria
5.1 General
This document specifies the minimum purity requirements for silvers salts used for the preservation of
water intended for human consumption. Limits are given for impurities commonly present in the
products. 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 the products should check the national regulations in order to clarify whether it is of
appropriate purity for the preservation of water intended for human consumption, taking into account
water quality, required dosage, contents of other impurities and additives used in the products 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 lead to significant quantities of impurities, by-products or additives being present, this
shall be notified to the user.
5.2 Composition of commercial products
The content of silver salts shall not be less than a mass fraction of 99 %.
5.3 Impurities and main by-products
The products shall conform to the requirements specified in Table 1.
Table 1 — Impurities
Impurity Limit
mg/kg of product
a) Silver nitrate b) Silver sulfate c) Silver chloride
– max. 1 n.a. n.a.
Chloride (Cl )
Copper (Cu) max. 0,056 100 30
Iron (Fe) max. 0,255 50 30
– max. 0,5 n.a. n.a.
Nitrite (NO )
–
2 max. 5 n.a. n.a.
Sulfate (SO )
NOTE n.a. = not applicable
prEN 15028:2020 (E)
5.4 Chemical parameters
The products shall conform to the requirements specified
...