SIST EN 935:2005

SLOVENSKI STANDARD
SIST EN 935:2005
01-marec-2005
1DGRPHãþD
SIST EN 935:2002
Kemikalije, ki se uporabljajo za pripravo pitne vode – Aluminijev železov (III) klorid
(monomerni) in aluminijev železov (III) klorid hidroksid (monomerni)
Chemicals used for treatment of water intended for human consumption - Aluminium iron
(III) chloride (monomeric) and aluminium iron(III) chloride hydroxide (monomeric)
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Aluminium-
Eisen(III)chlorid (Monomer) und Aluminium-Eisen(III)hydroxidchlorid (Monomer)
Produits chimiques utilisés pour le traitement de l'eau destinée a la consommation
humaine - Chlorure et hydroxychlorure d'aluminium et de fer (III) (monomeres)
Ta slovenski standard je istoveten z: EN 935:2004
ICS:
13.060.20 Pitna voda Drinking water
71.100.80 .HPLNDOLMH]DþLãþHQMHYRGH Chemicals for purification of
water
SIST EN 935:2005 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 935:2005

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SIST EN 935:2005



EUROPEAN STANDARD
EN 935

NORME EUROPÉENNE

EUROPÄISCHE NORM
November 2004
ICS 71.100.80 Supersedes EN 935:2001
English version
Chemicals used for treatment of water intended for human
consumption - Aluminium iron(III) chloride (monomeric) and
aluminium iron(III) chloride hydroxide (monomeric)
Produits chimiques utilisés pour le traitement de l'eau Produkte zur Aufbereitung von Wasser für den
destinée à la consommation humaine - Chlorure et menschlichen Gebrauch - Aluminium-Eisen(III)chlorid
hydroxychlorure d'aluminium et de fer (III) (monomères) (Monomer) und Aluminium-Eisen(III)hydroxidchlorid
(Monomer)
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 935:2004: E
worldwide for CEN national Members.

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SIST EN 935:2005
EN 935:2004 (E)
Contents
Page
Foreword.3
Introduction .4
1 Scope .5
2 Normative references .5
3 Description .5
4 Purity criteria.8
5 Test methods.9
6 Labelling - Transportation - Storage.10
Annex A (informative) General information on aluminium iron (lll) chloride (monomeric) and
aluminium iron (lll) chloride hydroxide (monomeric) .13
Annex B (normative) General rules relating to safety.17
Bibliography .18

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SIST EN 935:2005
EN 935:2004 (E)
Foreword
This document (EN 935:2004) 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 935:2001.
Significant technical differences between this edition and EN 935:2001 are as follows:
a) replacement of the reference to EU Directive 80/778/EEC of July, 15 1980 with the latest Directive in force
(see[1]);
b) 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.

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SIST EN 935:2005
EN 935:2004 (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 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 document is subject to regulation or control by National
Authorities.

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SIST EN 935:2005
EN 935:2004 (E)
1 Scope
This document is applicable to aluminium iron (III) chloride (monomeric) and aluminium iron (III) chloride hydroxide
(monomeric) used for treatment of water intended for human consumption. It describes the characteristics and
specifies the requirements for aluminium iron (III) chloride (monomeric) and aluminium iron (III) chloride hydroxide
(monomeric) and refers to the corresponding test methods. It gives information on their use in water treatment. It
also determines the rules relating to safe handling and use of aluminium iron (III) chloride (monomeric) and
aluminium iron (III) chloride hydroxide (monomeric) ( 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.
3 Description
3.1 Identification
3.1.1 Chemical name
a) Aluminium iron (III) chloride (monomeric);
b) Aluminium iron (III) chloride hydroxide (monomeric).
3.1.2 Synonym or common names
For aluminium iron (III) chloride hydroxide (monomeric): bauxite or clay hydroxide chloride.
3.1.3 Relative molecular mass
Variable (see 3.1.4).
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SIST EN 935:2005
EN 935:2004 (E)
3.1.4 Empirical formula
Al Fe (OH) Cl with (a + b) = 3 and x = 0,67 to 0,99 for aluminium iron chlorides
x 1-x a b
x = 0,80 to 0,99 for aluminium iron chloride hydroxides
a = 0 to 1,05
b = 3 to 1,95
a = 0 for aluminium iron(III) chloride (monomeric) products, and these products normally have a detectable free
acidity (see 5.2).
3.1.5 Chemical formula
Variable (see 3.1.4).
1)
3.1.6 CAS Registry Number
The following is a list of CAS Registry Numbers for products or their components.
AlCl : 7446-70-0.
3
FeCl : 7705-08-0.
3
Al(OH) Cl : 1327-41-9 with (a + b) = 3 and a less than 1,05.
a b
Al(OH)Cl : 14215-15-7.
2
2)
3.1.7 EINECS reference
The following is a list of EINECS reference numbers for products or their components.
AlCl : 231-208-1.
3
FeCl : 231-729-4.
3
Al(OH) Cl : 215-477-2.
a b
Al(OH)Cl : 238-071-7.
2
3.2 Commercial form
The products are available as liquids.
3.3 Physical properties
3.3.1 Appearance
The products are yellow to brown liquids.

1) Chemical Abstracts Service Registry Number.
2) European inventory of Existing Commercial chemical Substances.
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SIST EN 935:2005
EN 935:2004 (E)
3.3.2 Density
The density depends on the particular composition, especially the aluminium ion content, expressed as a mass
fraction of aluminium in %.
Typical value: 1,3 g/ml for 5,3 % Al.
3.3.3 Solubility in water
Aluminium iron (III) chloride (monomeric) and aluminium iron (III) chloride hydroxide (monomeric) are fully miscible
with water.
NOTE Depending on the particular product, dilute solutions can hydrolyze and form a precipitate.
3.3.4 Vapour pressure at 20 °C
Not known.
3)
3.3.5 Boiling point at 100 kPa
Not known.
3.3.6 Crystallization point
Typical value is - 20 °C for 5,3 % Al.
3.3.7 Specific heat
Not known.
3.3.8 Viscosity (dynamic)
Typical value is 20 mPa·s for 5,3 % Al at 20 °C.
3.3.9 Critical temperature
Not applicable.
3.3.10 Critical pressure
Not applicable.
3.3.11 Physical hardness
Not applicable.

3) 100 kPa = 1 bar.
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SIST EN 935:2005
EN 935:2004 (E)
3.4 Chemical properties
Aluminium iron (III) chloride (monomeric) and aluminium iron (III) chloride hydroxide (monomeric) are acidic liquids
which hydrolyse and form a precipitate of aluminium hydroxide and iron hydroxide when diluted beyond a particular
concentration.
NOTE The solubility of aluminium and the solubility of iron depend on the pH value and the product should be used within
an appropriate pH range.
4 Purity criteria
4.1 General
This document specifies the minimum purity requirements for aluminium iron (III) chloride (monomeric) and
aluminium iron (III) chloride hydroxide (monomeric) used for the treatment of water intended for human
consumption. Limits are given for impurities commonly present in the products. 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 these products 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 products not stated in this product standard.
Limits have been given for impurities and chemical parameters where these are likely to be present in significant
quantities from the current production processes 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 (aluminium ion content) expressed as grams per kilogram of product (Al g/kg)
shall be greater than 40 g/kg. The contents of aluminium and iron shall be within ± 3 % of the manufacturer's
declared values. The ratio Fe/Al shall be less than 0,50 for aluminium iron (III) chloride hydroxides (monomeric)
and less than 1,0 for aluminium iron (III) chlorides (monomeric).
The relative basicity, expressed as the mole ratio OH/3(Al + Fe), shall be within the range 0 to 0,35 for aluminium
iron (III) chloride hydroxides (monomeric). For aluminium iron (III) chloride (monomeric), the basicity is zero.
Aluminium iron (III) chloride (monomeric) often have a free acidity.
4.3 Impurities and main by-products
The content of insoluble matter shall be lower than 25 g/k
...