EN 1018:2021

Chemicals used for treatment of water intended for human consumption - Calcium carbonate

This document is applicable to calcium carbonate used for treatment of water intended for human consumption. It describes the characteristics of calcium carbonate and specifies the requirements and the corresponding test methods for calcium carbonate. It gives information on its use in water treatment.

Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Calciumcarbonat

Dieses Dokument gilt für Calciumcarbonat zur Aufbereitung von Wasser für den menschlichen Gebrauch. Es beschreibt die Eigenschaften von Calciumcarbonat und legt die Anforderungen sowie die entsprechenden Prüfverfahren für Calciumcarbonat fest. Es enthält Angaben zu dessen Anwendung in der Wasser¬aufbereitung.

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

Le présent document est applicable au carbonate de calcium utilisé pour le traitement de l’eau destinée à la consommation humaine. Il décrit les caractéristiques du carbonate de calcium et spécifie les exigences, ainsi que les méthodes d’essai correspondantes, relatives à ce produit. Il donne des informations quant à son utilisation dans le traitement de l’eau.

Kemikalije, ki se uporabljajo za pripravo pitne vode - Kalcijev karbonat

General Information

• Status: Published
• Publication Date: 01-Jun-2021
• Withdrawal Date: 30-Dec-2021
• 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: 02-Jun-2021
• Due Date: 04-Dec-2021
• Completion Date: 02-Jun-2021
• Ref Project: SIST EN 1018:2021 - Chemicals used for treatment of water intended for human consumption - Calcium carbonate

Relations

• Replaces: EN 1018:2013+A1:2015 - Chemicals used for treatment of water intended for human consumption - Calcium carbonate
• Effective Date: 26-Jun-2019
• Revised: FprEN 1018 - Chemicals used for treatment of water intended for human consumption - Calcium carbonate
• Effective Date: 18-Jan-2023

Overview

EN 1018:2021 - published by CEN - is the European standard for calcium carbonate used as a chemical for the treatment of water intended for human consumption. The document describes identification, physical and chemical properties, purity criteria, required test methods, labelling, transport and storage considerations, and practical information on the use of calcium carbonate in drinking‑water treatment. It supersedes EN 1018:2013+A1:2015 and is intended for adoption by CEN member bodies.

Key topics and technical requirements

• Scope and identification
  • Covers both natural (limestone) and chemically produced calcium carbonate (CaCO3). Includes CAS and EINECS references.
  • Physical properties provided (appearance, density, solubility, particle size ranges).
• Classification
  • Distinguishes non‑porous and porous calcium carbonate and defines classes/grades based on CaCO3 content and total carbonate content.
  • Composition classes specify minimum CaCO3 mass fractions for different grades (e.g., Class 1 / Class 2 / Class 3).
• Purity and impurities
  • Limits for residues insoluble in HCl, and for trace elements (antimony, arsenic, cadmium, chromium, lead, mercury, nickel, selenium) are provided; two limit sets (Type A / Type B).
• Test methods and sampling
  • Refers to EN 12485 for analytical procedures and to ISO 3165, ISO 6206 for sampling; ISO 9277 (BET) referenced for specific surface area measurement.
• Labelling, transport and storage
  • Product marking and accompanying documentation requirements (product name, class/grade/type, net mass, supplier).
  • Calcium carbonate is not classified as dangerous goods; users must be aware of incompatibilities (e.g., keep away from acids).
  • Long‑term stability: stable if kept dry.

Applications and practical use

• Used to adjust pH and hardness, and to remineralise desalinated water (often with CO2) in drinking‑water treatment processes.
• Available in crushed/granular forms, slurries or blends to suit dosing and process requirements.
• Practical for water utilities, municipal and industrial water treatment plants, and for laboratories specifying or verifying dosing chemicals.

Who should use this standard

• Water utilities and plant operators specifying treatment chemicals
• Chemical manufacturers and suppliers of calcium carbonate
• Testing laboratories performing compliance analyses
• Regulatory bodies, consultants and procurement teams assessing material suitability for drinking‑water applications

Related standards

• EN 12485 (test methods for calcium carbonate and related products)
• ISO 3165, ISO 6206 (sampling standards)
• ISO 9277 (BET surface area determination)

Note: Conformity with EN 1018:2021 does not automatically imply national regulatory acceptance; users should check local drinking‑water regulations and authority requirements. Keywords: EN 1018:2021, calcium carbonate standard, water treatment chemicals, drinking water, purity criteria, test methods, CEN.

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2021
Nadomešča:
SIST EN 1018:2013+A1:2015
Kemikalije, ki se uporabljajo za pripravo pitne vode - Kalcijev karbonat
Chemicals used for treatment of water intended for human consumption - Calcium
carbonate
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch -
Calciumcarbonat
Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation
humaine - Carbonate de calcium
Ta slovenski standard je istoveten z: EN 1018:2021
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 1018
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2021
EUROPÄISCHE NORM
ICS 71.100.80 Supersedes EN 1018:2013+A1:2015
English Version
Chemicals used for treatment of water intended for human
consumption - Calcium carbonate
Produits chimiques utilisés pour le traitement de l'eau Produkte zur Aufbereitung von Wasser für den
destinée à la consommation humaine - Carbonate de menschlichen Gebrauch - Calciumcarbonat
calcium
This European Standard was approved by CEN on 26 April 2021.

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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1018:2021 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 . 8
5.4 Chemical parameters. 8
6 Test methods . 8
6.1 Sampling . 8
6.2 Analyses. 8
7 Labelling - Transportation - Storage . 9
7.1 Means of delivery . 9
7.2 Labelling according to the EU legislation . 9
7.3 Transportation regulations and labelling . 9
7.4 Marking . 9
7.5 Storage . 9
Annex A (informative) General information on calcium carbonate . 10
A.1 Origin . 10
A.2 Use . 10
A.3 Rules for safe handling and use . 11
A.4 Emergency procedures . 11
Annex B (normative) Sample preparation and testing of specific surface of calcium
carbonate . 12
B.1 Sample preparation . 12
B.2 Testing . 12
B.3 Criteria for non-porous and porous calcium carbonates . 12
Bibliography . 13

European foreword
This document (EN 1018:2021) 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 December 2021, and conflicting national standards shall
be withdrawn at the latest by December 2021.
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 1018:2013+A1:2015.
In comparison with the previous edition, the following technical modifications have been made:
— modification of 7.3 on transportation regulations and labelling, adding the sentence “The user shall
be aware of the incompatibilities between transported products.”;
— modification of 7.4 on marking. The requirements of marking are also applied to the accompanying
documents;
— changes in the requirements for the composition of the porous products (Table 1) and their
impurities (Table 2).
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:
1) 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;
2) 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.
1 Scope
This document is applicable to calcium carbonate used for treatment of water intended for human
consumption. It describes the characteristics of calcium carbonate and specifies the requirements and
the corresponding test methods for calcium carbonate. It gives inf
...