SIST EN 882:2005

SLOVENSKI STANDARD
SIST EN 882:2005
01-marec-2005
1DGRPHãþD
SIST EN 882:1999
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 a la consommation
humaine - Aluminate de sodium
Ta slovenski standard je istoveten z: EN 882:2004
ICS:
13.060.20 Pitna voda Drinking water
71.100.80 .HPLNDOLMH]DþLãþHQMHYRGH Chemicals for purification of
water
SIST EN 882:2005 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST EN 882:2005

---------------------- Page: 2 ----------------------

SIST EN 882:2005



EUROPEAN STANDARD
EN 882

NORME EUROPÉENNE

EUROPÄISCHE NORM
November 2004
ICS 71.100.80 Supersedes EN 882:1997
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 menschlichen
destinée à la consommation humaine - Aluminate de Gebrauch - Natriumaluminat
sodium
This European Standard was approved by CEN on 30 September 2004.

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, 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
© 2004 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 882:2004: E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------

SIST EN 882:2005
EN 882:2004 (E)
Contents
Page
Foreword.3
Introduction .4
1 Scope .5
2 Normative references .5
3 Description .5
4 Purity criteria.8
5 Test methods.10
6 Labelling – Transportation – Storage .11
Annex A (informative) General information on sodium aluminate.13
Annex B (normative) General rules relating to safety.17
Bibliography .18

2

---------------------- Page: 4 ----------------------

SIST EN 882:2005
EN 882:2004 (E)
Foreword
This document (EN 882:2004) 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 May 2005, and conflicting national standards shall be withdrawn at the
latest by May 2005.
This document supersedes EN 882:1997.
Significant technical differences between this edition and EN 882:1997 are as follows:
a) replacement of the reference to EU Directive 80/778 of 15 July 1980 with the latest Directive in force
(see[1]);
b) introduction of an annex B (normative) giving general rules relating to safety;
c) expansion of Annex A by addition of A.2 "Quality of commercial product".
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, Slovakia, Slovenia, Spain, Sweden, Switzerland
and United Kingdom.
3

---------------------- Page: 5 ----------------------

SIST EN 882:2005
EN 882:2004 (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.

4

---------------------- Page: 6 ----------------------

SIST EN 882:2005
EN 882:2004 (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 and use of sodium aluminate (see Annex B).
2 Normative references
The following referenced documents are indispensable for the application 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 1302, Chemicals used for treatment of water intended for human consumption – Aluminium based
coagulants – Analytical methods
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 Description
3.1 Identification
3.1.1 Chemical name
Aluminium sodium oxide
3.1.2 Synonym or common name
Sodium aluminate
3.1.3 Relative molecular mass
82 for NaAlO
2.
3.1.4 Empirical formula

NaAlO 0,1 Na O.nH O (n varies from 0,3 to 0,4)
2 2 2
3.1.5 Chemical formula
NaAlO
2
5

---------------------- Page: 7 ----------------------

SIST EN 882:2005
EN 882:2004 (E)
1)
3.1.6 CAS Registry Number
11138-49-1
2)
3.1.7 EINECS reference
234-391-6
3.2 Commercial form
Sodium aluminate is available as solids (powder or granules) or solutions.
3.3 Physical properties
3.3.1 Appearance
The product is a white powder or granules or colourless to yellow liquid.
3.3.2 Density
3
The absolute density of solids products is 2,35 g/cm
3 3
The tamped bulk density (powder) is between 1 g/cm to 1,2 g/cm (depends on grain size).
The density of solutions is 1,5 g/ml for a solution containing 10 % of active matter, expressed as mass
fraction of aluminium in the product (10 % Al).
3.3.3 Solubility
Sodium aluminate is soluble in water to yield solutions of up to 12,7 % Al at 20 °C (concentration higher
than 400 g/l).
NOTE Depending on temperature and degree of dilution, solutions of sodium aluminate can hydrolyse and form a
precipitate.
3.3.4 Vapour pressure
 Solid not applicable
 Solution not known

1) Chemical Abtracts Service Registry Number.
2) European inventory of Existing Commercial chemicals Substances.
6

---------------------- Page: 8 ----------------------

SIST EN 882:2005
EN 882:2004 (E)
3)
3.3.5 Boiling point at 100 kPa
 Solid not applicable
 Solution not known
3.3.6 Melting or crystallization point
 Solid melting point : ≈ 1 650 °C
 Solution typical values for crystallization point range between - 15 °C and - 25 °C
3.3.7 Specific heat
Not known
3.3.8 Viscosity (dynamic)
Typical values of dynamic viscosity for sodium aluminate solutions, containing 10 % Al and 12,7 % Al are
given in Table 1.
Table 1 – Viscosity
Temperature Viscosity
.
°C
mPa s
10 % Al 12,7 % Al
- 5 1 250 15 000
0 650 7 000
5 360 2 850
10 200 1 650
15 140 900
20 120 560
3.3.9 Critical temperature
Not applicable
3.3.10 Critical pressure
Not applicable
3.3.11 Physical hardness
 Solid not known
 Solution not applicable

3) 100 kPa = 1 bar
7

---------------------- Page: 9 ----------------------

SIST EN 882:2005
EN 882:2004 (E)
3.4 Chemical properties
Sodium aluminate solutions are highly alkaline. Their solutions hydrolyse and form a precipitate of
aluminium hydroxide when diluted beyond a particular level or neutralized.
NOTE Since aluminium compounds are amphoteric in nature, the solubility of aluminium depends on the pH value
and the product should to be used within an appropriate pH range.
When dissolved in drinking water, calcium is partially precipitated with aluminium hydroxide.
4 Purity criteria
4.1 General
This document specifies the minimum purity requirements for sodium aluminate used for the treatment of
water intended for human consumption. Limits are given for impurities commonly present in the product.
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.
NOTE Users of this product should check the national regulations in order to clarify whether it is of appropriate purity
for treatment of water intended for human consumption, taking into account raw water quality, required dosage, contents
of other impurities and additives used in the product not stated in this document.
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 leads to significant quantities of impurities, by-products or additives being present, this shall
be notified to the user.
4.2 Composition of commercial product
The concentration of active matter in the commercial product, expressed as a mass fraction of aluminium
in the product (Al %) shall be within ± 3 % of the manufacturer's declared values.
NOTE The concentration of water-soluble aluminium in commercial product varies. Typical values are given here
below:
Al % of the product
Solid forms 27,5 to 29,1
Solution forms 10 to 13,2
8

---------------------- Page: 10 ----------------------

SIST EN 882:2005
EN 882:2004 (E)
4.3 Impurities and main by-products
The product shall conform to the requirements specified in Table 2.
Table 2 – Limits of impurities
Limit
Impurity
g/kg of Al
Iron (Fe) max. 0,8
Insoluble matter 8
(solid product) max
NOTE The value quoted for iron is both iron (II) and iron
(III). Iron can be present as a component of the product and will
usually be removed in the treatment process.
4.4 Chemical parameters
The product shall conform to the requirements specified in Table 3.
Table 3 – Chemical parameters
Limit
Parameter mg/kg of Al
type 1 type 2 type 3
Arsenic (As) max. 14 40 100
Cadmium (Cd) max. 3 50 100
Chromium (Cr) max. 30 700 1 000
Mercury (Hg) max. 4 10 20
Nickel (Ni) max. 20 700 1 000
Lead (Pb) max. 4
...