prEN 897

SLOVENSKI STANDARD
01-julij-2020
Kemikalije, ki se uporabljajo za pripravo pitne vode - Natrijev karbonat
Chemicals used for treatment of water intended for human consumption - Sodium
carbonate
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch -
Natriumcarbonat
Produits chimiques utilisés pour le traitement de leau destinée à la consommation
humaine - Carbonate de sodium
Ta slovenski standard je istoveten z: prEN 897
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 897:2012
English Version
Chemicals used for treatment of water intended for human
consumption - Sodium 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 - Natriumcarbonat
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, 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 897:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Description . 6
5 Purity criteria . 8
Table 1 — Impurities . 9
Table 2 — Chemical parameters . 9
6 Test methods . 9
7 Labelling – Transportation – Storage . 11
Figure 1 — GHS 07 . 11
Annex A (informative) General information on sodium carbonate . 13
A.1 Origin . 13
A.1.1 Raw materials . 13
A.1.2 Manufacturing process . 13
A.2 Use . 13
A.2.1 Function . 13
A.2.2 Form in which it is used . 13
A.2.3 Treatment dose . 13
A.2.4 Means of application . 13
A.2.5 Secondary effects. 13
A.2.6 Removal of excess product . 13
Annex B (normative) Analytical methods . 14
B.1 Determination of arsenic, cadmium, chromium, lead and nickel (inductively coupled
plasma optical emission spectrometry (ICP/OES)) . 14
B.1.1 General . 14
Table B.1 — Concentration range . 14
B.1.2 Principle . 14
B.1.3 Reagents . 14
B.1.4 Apparatus . 15
Table B.2 — Parameters and operating conditions of the spectrometer . 15
B.1.5 Procedure . 15
B.1.5.1 Test portion . 15
B.1.5.2 Test solution . 15
B.1.5.3 Calibration and verification solutions . 15
Table B.3 — Calibration solutions for the different elements . 16
B.1.5.4 Determination . 16
B.1.5.4.1 Preparation of the apparatus . 16
Table B.4 — Wavelength per element . 16
B.1.5.4.2 Spectrometric measurements . 16
B.1.6 Expression of results . 17
B.1.6.1 Evaluation . 17
B.1.6.2 Calculation . 17
B.2 Determination of mercury (cold vapour atomic absorption spectrometry) . 18
B.2.1 General . 18
B.2.2 Principle . 18
B.2.3 Reagents . 18
B.2.4 Apparatus . 18
B.2.5 Procedure . 18
B.2.5.1 Test portion . 18
B.2.5.2 Test solution . 18
B.2.5.3 Blank test solution . 18
B.2.5.4 Calibration solutions . 18
B.2.5.5 Determination . 18
B.2.6 Expression of results . 18
Annex C (normative) General rules relating to safety . 19
C.1 Rules for safe handling and use . 19
C.2 Emergency procedures . 19
C.2.1 First aid . 19
C.2.2 Spillage . 19
C.2.3 Fire . 19
Bibliography . 20
European foreword
This document (prEN 897:2020) 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 897:2012.
In comparison with the previous edition, the following technical modifications have been made:
a) Modification of 6.3 on transportation regulations and labelling, adding the sentence “The user must be
aware of the incompatibilities between transported products.”;
b) Modification of 6.4 on marking. The requirements of marking are also applied to the accompanying
documents.
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.
1 Scope
This document is applicable to sodium carbonate used for treatment of water intended for human
consumption. It describes the characteristics and specifies the requirements and the corresponding test
methods for sodium carbonate. It gives information on its use in water treatment. It also determines the
rules relating to safe handling and use (see Annex C).
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)
EN ISO 12846:2012, Water quality - Determination of mercury - Method using atomic absorption spectrometry
(AAS) with and without enrichment (ISO 12846:2012)
ISO 740, Sodium carbonate for industrial use — Determination of total soluble alkalinity — Titrimetric method
ISO 746, Sodium carbonate for industrial use — Determination of matter insoluble in water at 50 degrees C
ISO 2460, Sodium hydrogen carbonate for industrial use — Determination of iron content — 1,10-
Phenanthroline photometric method
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
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 http://www.iso.org/obp
4 Description
4.1 Identification
4.1.1 Chemical name
Sodium carbonate.
4.1.2 Synonym or common name
Soda ash, anhydrous sodium carbonate, light soda ash, heavy soda ash.
4.1.3 Relative molecular mass
105,99.
4.1.4 Empirical formula
Na CO
2 3.
4.1.5 Chemical formula
Na CO
2 3.
1)
4.1.6 CAS Registry Number
497-19-8.
2)
4.1.7 EINECS reference
207-838-8.
4.2 Commercial forms
The product is available as dry powder or fine granules and is described as light soda ash or heavy soda ash
according to bulk density (see 4.3.2).
4.3 Physical properties
4.3.1 Appearance
The product is a white powder or crystals, slightly hygroscopic.
4.3.2 Density
The density of this product is 2,53 g/cm .
The bulk density is:
3 3
ranging from 0,5 kg/dm to 0,65 kg/dm (light soda ash);
3 3
ranging from 0,8 kg/dm to 1,2 kg/dm (heavy soda ash).
4.3.3 Solubility in water
The product is soluble at 212 g/l at 20 °C.
4.3.4 Vapour pressure
Not applicable.
3)
4.3.5 Boiling point at 100 kPa
Not applicable.
1)
Chemical Abstracts Service Registry Number.
2)
European Inventory of Existing Commercial Chemical Substances.
3)
100 kPa = 1 bar.
oSI
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