EN 936:2006

SLOVENSKI STANDARD
01-januar-2007
1DGRPHãþD
SIST EN 936:1999
Kemikalije, ki se uporabljajo za pripravo pitne vode - Ogljikov dioksid
Chemicals used for treatment of water intended for human consumption - Carbon dioxide
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch -
Kohlenstoffdioxid
Produits chimiques utilisés pour le traitement de l'eau destinée a la consommation
humaine - Dioxyde de carbone
Ta slovenski standard je istoveten z: EN 936:2006
ICS:
13.060.20 Pitna voda Drinking water
71.100.80 .HPLNDOLMH]DþLãþHQMHYRGH Chemicals for purification of
water
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 936
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2006
ICS 71.100.80 Supersedes EN 936:1997
English Version
Chemicals used for treatment of water intended for human
consumption - Carbon dioxide
Produits chimiques utilisés pour le traitement de l'eau Produkte zur Aufbereitung von Wasser für den
destinée à la consommation humaine - Dioxyde de carbone menschlichen Gebrauch - Kohlenstoffdioxid
This European Standard was approved by CEN on 26 June 2006.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 936:2006: E
worldwide for CEN national Members.

Contents Page
Foreword.3
Introduction.4
1 Scope.5
2 Description.5
2.1 Identification.5
2.2 Commercial form.5
2.3 Physical properties.6
2.4 Chemical properties.6
3 Purity criteria.7
3.1 General.7
3.2 Composition of commercial product.7
3.3 Impurities and main by-products.7
3.4 Chemicals parameters.7
4 Test methods.7
4.1 Sampling.7
4.2 Analysis.7
5 Labelling - Transportation - Storage.8
5.1 Means of delivery.8
5.2 Risk and safety labelling according to the EU Directives .8
5.3 Transportation regulations and labelling.8
5.4 Marking.9
5.5 Storage.9
Annex A (informative) General information on carbon dioxide.10
A.1 Origin.10
A.2 Use.12
A.3 General rules relating to safety.12
Bibliography.14

Foreword
This document (EN 936:2006) 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 February 2007, and conflicting national standards shall be withdrawn
at the latest by February 2007.
This European Standard supersedes EN 936:1997.
Significant technical differences between this edition and EN 936:1997 are as follows:
a) deletion of the reference to EU Directive 80/778/EEC of July,15 1980 in order to take into account of the
last Directive in force (see [1]);
b) updating of the transportation regulations and labelling.
c) the requirement for carbon dioxide content is now only 99% instead of 99.7% in the latest edition
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.
Introduction
In respect to the potential adverse effects on the quality of water intended for human consumption caused by
the product covered by this European Standard:
a) this European Standard provides no information as to whether the product may be used without
restriction in any of the Member States of the EU or EFTA;
d) 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 European Standard is subject to
regulation or control by National Authorities.

1 Scope
This European Standard is applicable to carbon dioxide used for treatment of water intended for human
consumption. It describes the characteristics of carbon dioxide and specifies the requirements and
corresponding analytical methods for carbon dioxide. It also gives information on its use in water treatment.
2 Description
2.1 Identification
2.1.1 Chemical name
Carbon dioxide.
2.1.2 Synonym or common name
Carbonic acid gas (carbonic anhydride).
2.1.3 Relative molecular mass
44,011.
2.1.4 Empirical formula
CO .
2.1.5 Chemical formula
CO .
1)
2.1.6 CAS Registry Number
124-38-9.
2)
2.1.7 EINECS reference
204-696-9.
2.2 Commercial form
The carbon dioxide is supplied as a liquefied gas.
NOTE The solid form is not usually used for the treatment of water intended for human consumption.

1) Chemical Abstracts Service Registry Number.
2) European Inventory of Existing Commercial Chemical Substances.
2.3 Physical properties
2.3.1 Appearance
The carbon dioxide is a colourless gas or liquid.
2.3.2 Density
3) 3
The density of the gas at 0 °C and 101,3 kPa is 1,9 768 kg/m , while the density of the liquid at 0 °C and
4 000 kPa is 933,318 kg/m .
2.3.3 Solubility in water
The solubility of the gas in water is 1,72 g/l at 20 °C and 101,3 kPa.
2.3.4 Vapour pressure
The vapour pressure of the liquid is 5 733,0 kPa at 20 °C.
3)
2.3.5 Boiling point at 100 kPa
(See 2.3.6).
2.3.6 Melting point
The sublimation point of solid CO is -78,9 °C (and 101,3 kPa).
2.3.7 Specific heat
The specific heat of carbon dioxide is 0,827 kJ/kg x K at 0 °C and 100 kPa.
2.3.8 Viscosity (dynamic)
-7
The viscosity of
...