oSIST prEN 882:2025

Chemicals used for treatment of water intended for human consumption - Sodium aluminate

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

Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Natriumaluminat

Dieses Dokument gilt für Natriumaluminat zur Aufbereitung von Wasser für den menschlichen Gebrauch. Es beschreibt die Eigenschaften von Natriumaluminat und legt die Anforderungen für Natriumaluminat fest und verweist auf die entsprechenden Analysenverfahren. Es enthält Angaben zur Anwendung von Natriumaluminat in der Wasseraufbereitung. Es legt darüber hinaus Regeln für die sichere Handhabung (Anhang B) und Verwendung (Anhang A) von Natriumaluminat fest.

Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Aluminate de sodium

Le présent document est applicable à l’aluminate de sodium utilisé pour le traitement de l’eau destinée à la consommation humaine. Il spécifie les caractéristiques et les exigences de l’aluminate de sodium et fait référence aux 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 de manipulation (Annexe B) et d’utilisation de l’aluminate de sodium (Annexe A).

Kemikalije, ki se uporabljajo za pripravo pitne vode - Natrijev aluminat

General Information

• Status: Not Published
• Public Enquiry End Date: 15-Oct-2025
• 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: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 19-Aug-2025
• Due Date: 06-Jan-2026
• Completion Date: 20-Oct-2025
• Ref Project: FprEN 882 - Chemicals used for treatment of water intended for human consumption - Sodium aluminate

Relations

• Revises: SIST EN 882:2016 - Chemicals used for treatment of water intended for human consumption - Sodium aluminate
• Effective Date: 19-Jan-2023

Overview

oSIST prEN 882:2025 is a European standard developed by CEN for chemicals used in the treatment of water intended for human consumption, specifically focusing on sodium aluminate. This document outlines the characteristics, quality requirements, analytical methods, and guidance for the safe use of sodium aluminate in potable water treatment processes. Sodium aluminate is a widely utilized coagulant and flocculant, valued for its ability to improve water clarity and meet regulatory safety standards for drinking water quality.

Key Topics

• Scope of Standard: Specifies requirements for sodium aluminate used in treating drinking water, including product characteristics, purity criteria, and safe handling procedures.
• Product Forms: Sodium aluminate is commercially available as solids (powder or granules) and as solutions, each with specific storage and handling needs.
• Chemical and Physical Properties:
  • Highly alkaline, soluble in water, and typically a white solid or colorless to yellow solution.
  • Density and viscosity are defined by concentration and temperature.
  • Manufactured primarily from aluminium hydroxide, sodium hydroxide, or aluminium metal.
• Purity and Impurities:
  • Quality grades reflect the concentrations of active aluminium and limits for potential contaminants such as iron, heavy metals, and insoluble matter.
  • Purity is essential for suitability in potable water applications, with detailed criteria for arsenic, cadmium, chromium, and other metals.
• Labeling and Transportation:
  • Complies with EU chemical safety legislation, including hazard labeling for corrosivity.
  • Defined UN numbers for both solid and liquid forms and classified for transport regulation.
• Safe Handling and Storage:
  • Recommendations for storing sodium aluminate in corrosion-resistant containers. Both solid and solution forms must be protected from moisture, extreme temperatures, and incompatible materials.
  • The substance is corrosive and may react with certain metals to produce hazardous gases.

Applications

Sodium aluminate is an essential chemical in water treatment plants across Europe, supporting compliance with drinking water directives and ensuring consumer safety. Its main functions include:

• Coagulation and Flocculation: Enhances removal of suspended solids, organic matter, and phosphates, thereby improving clarity and reducing contaminants in finished drinking water.
• pH and Alkalinity Adjustment: Increases pH and alkalinity, enabling optimal conditions for other treatment processes and reducing corrosion in distribution systems.
• Removal of Heavy Metals: Assists in the precipitation and removal of metals like iron and manganese from raw water.

Practical considerations outlined in the standard help operators:

• Select appropriate product grades based on raw water characteristics and regulatory requirements.
• Dose and apply sodium aluminate efficiently using dilution and metering systems.
• Manage secondary effects, such as increased pH or interactions with anions.
• Ensure safe work environments through emergency procedures and protective equipment guidance.

Related Standards

• EN 1302: Analytical methods for aluminium-based coagulants in drinking water treatment.
• Directive (EU) 2020/2184: European requirements for drinking water quality, referenced for permissible contaminant levels.
• Regulation (EC) No 1272/2008 (CLP): Classification, labelling, and packaging of chemical substances and mixtures.
• Additional international transportation regulations (ADR, RID, IMDG, IATA) are referenced for safe shipping.

oSIST prEN 882:2025 guides water utilities, suppliers, and regulators in the responsible use of sodium aluminate, supporting consistent and safe drinking water treatment across Europe. Compliance with this standard helps ensure the effectiveness and safety of water purification processes involving sodium aluminate.

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2025
Kemikalije, ki se uporabljajo za pripravo pitne vode - Natrijev aluminat
Chemicals used for treatment of water intended for human consumption - Sodium
aluminate
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch -
Natriumaluminat
Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation
humaine - Aluminate de sodium
Ta slovenski standard je istoveten z: prEN 882
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
prEN 882
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2025
ICS 71.100.80 Will supersede EN 882:2016
English Version
Chemicals used for treatment of water intended for human
consumption - Sodium aluminate
Produits chimiques utilisés pour le traitement de l'eau Produkte zur Aufbereitung von Wasser für den
destinée à la consommation humaine - Aluminate de menschlichen Gebrauch - Natriumaluminat
sodium
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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 882:2025 E
worldwide for CEN national Members.

prEN 882:2025 (E)
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Description . 6
4.1 Identification . 6
4.1.1 Chemical name . 6
4.1.2 Synonym or common name . 6
4.1.3 Relative molecular mass . 6
4.1.4 Empirical formula . 6
4.1.5 Chemical formula . 7
4.1.6 CAS Registry Number . 7
4.1.7 EINECS reference . 7
4.2 Commercial form . 7
4.3 Physical properties . 7
4.3.1 Appearance . 7
4.3.2 Density . 7
4.3.3 Solubility . 7
4.3.4 Vapour pressure . 7
4.3.5 Boiling point at 100 kPa . 8
4.3.6 Melting or crystallization point . 8
4.3.7 Specific heat . 8
4.3.8 Viscosity (dynamic) . 8
4.3.9 Critical temperature . 8
4.3.10 Critical pressure . 8
4.3.11 Physical hardness . 8
4.4 Chemical properties . 9
5 Purity criteria . 9
5.1 General . 9
5.2 Composition of commercial product . 9
5.3 Impurities and main by-products . 10
5.4 Chemical parameters . 10
6 Test methods . 10
6.1 Sampling . 10
6.2 Analyses . 11
7 Labelling – Transportation – Storage . 11
7.1 Means of delivery . 11
7.2 Labelling in accordance with the EU legislation . 11
7.3 Transportation regulations and labelling . 12
7.4 Marking . 12
7.5 Storage . 12
7.5.1 General . 12
prEN 882:2025 (E)
7.5.2 Long term stability . 13
7.5.3 Storage incompatibilities . 13
Annex A (informative) General information on sodium aluminate . 14
A.1 Origin . 14
A.1.1 Raw materials . 14
A.1.2 Manufacturing process . 14
A.2 Quality of commercial product . 14
A.3 Use . 16
A.3.1 Function . 16
A.3.2 Form in which it is used. 16
A.3.3 Treatment dose . 16
A.3.4 Means of application . 16
A.3.5 Secondary effects . 16
A.3.6 Removal of excess product . 17
Annex B (normative) General rules relating to safety . 18
B.1 Rules for safe handling and use . 18
B.2 Emergency procedures . 18
B.2.1 Accident . 18
B.2.2 Spillage . 18
B.2.3 Fire . 18
Bibliography . 19

prEN 882:2025 (E)
European foreword
This document (prEN 882:2025) has been prepared by Technical Committee CEN/TC 164 “Water
supply”, the secretariat of which is held by AFNOR.
This document has been submitted to the CEN Enquiry.
This document will supersede EN 882:2016.
Significant technical differences between this edition prEN 882:2025 and EN 882:2016 are as follows:
a) update of the information related to Drinking Water Directive.

prEN 882:2025 (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 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.

prEN 882:2025 (E)
1 Scope
This document is applicable to sodium aluminate used for treatment of water intended for human
consumption. It describes the characteristics and specifies the requirements of sodium aluminate 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 (Annex B) and use of sodium aluminate (Annex A).
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. 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
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology 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
Aluminium sodium oxide
Aluminium sodium dioxide
Aluminium sodium tetrahydroxide
4.1.2 Synonym or common name
Sodium aluminate
4.1.3 Relative molecular mass
82 for NaAlO .
4.1.4 Empirical formula
a) NaAlO .
b) NaAlO 0,1 Na O⋅nH O (n varies from 0,3 to 0,4).
2 2 2
...