EN 887:2004

SLOVENSKI STANDARD
01-marec-2005
1DGRPHãþD
SIST EN 887:2002
Kemikalije, ki se uporabljajo za pripravo pitne vode – Aluminijev železov (III) sulfat
Chemicals used for treatment of water intended for human consumption - Aluminium iron
(III) sulfate
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Aluminium-
Eisen(III)-sulfat
Produits chimiques utilisés pour le traitement de l'eau destinée a la consommation
humaine - Sulfate d'aluminium et de fer (III)
Ta slovenski standard je istoveten z: EN 887:2004
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 887
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2004
ICS 71.100.80 Supersedes EN 887:2001
English version
Chemicals used for treatment of water intended for human
consumption - Aluminium iron (III) sulfate
Produits chimiques utilisés pour le traitement de l'eau Produkte zur Aufbereitung von Wasser für den
destinée à la consommation humaine - Sulfate d'aluminium menschlichen Gebrauch - Aluminium-Eisen(III)-sulfat
et de fer (III)
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 887:2004: E
worldwide for CEN national Members.

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.11
Annex A (informative)  General information on aluminium iron (III) sulfate.13
Annex B (normative)  General rules relating to safety.17
Bibliography .18
Foreword
This document (EN 887:2004) 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 887:2001.
Significant technical differences between this edition and EN 887:2001 are as follows:
a) replacement of the reference to EU Directive 80/778 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.

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 aluminium iron (III) sulfate used for treatment of water intended for human
consumption. It describes the characteristics of aluminium iron (III) sulfate and specifies the requirements for
aluminium iron (III) sulfate and refers to the corresponding analytical methods. It gives information on its use in
water treatment. It also determines the rules relating to safe handling and use of aluminium iron (III) sulfate (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 iron (III) sulfate.
3.1.2 Synonym or common name
Aluminium and iron sulfate.
3.1.3 Relative molecular mass
Variable (see 3.1.4).
3.1.4 Empirical formula
(Al Fe ) (SO ) where x is 0,70 to 0,95.
x 1-x 2 4 3
3.1.5 Chemical formula
xAl (SO ) . (1 - x) Fe (SO ) . n H O where n is variable and x varies from 0,70 to 0,95.
2 4 3 2 4 3 2
)
3.1.6 CAS Registry Number
The following is a list of CAS Registry Numbers for the components:
Al (SO ) : 10043-01-3;
2 4 3
Fe (SO ) : 10028-22-5.
2 4 3
2)
3.1.7 EINECS reference
The following is a list of EINECS reference numbers for the components:
Al (SO ) : 233-135-0;
2 4 3
Fe (SO ) : 233-072-9.
2 4 3
3.2 Commercial forms
Aluminium iron (III) sulfate is available in solid hydrated forms, with different particle sizes (slabs, kibbled, ground,
granulated), and as aqueous solutions.
3.3 Physical properties
3.3.1 Appearance
The product is a yellow to brown solid or liquid.
3.3.2 Density
The density of aluminium iron (III) sulfate solution varies depending on the composition.
For example:
 1,330 g/ml for solution containing 36 g/kg of Al and 15 g/kg of Fe at 15 °C.
The bulk density (loose) of granulated solid product is approximately 0,9 g/cm .
3.3.3 Solubility in water
The solubility of aluminium iron (III) sulfate varies depending on the content of iron.
For example:
 for a solid form containing 72 g/kg of aluminium and 30 g/kg of iron , at 0 °C the solubility is :
 36 g/kg of Al in solution ;
 15 g/kg of Fe in solution.
3.3.4 Vapour pressure at 20 °C
Not known.
1)
Chemical Abstracts Service Registry Number.
2)
European Inventory of Existing Commercial Chemical Substances.
3)
3.3.5 Boiling point at 100 kPa
120 °C for a saturated solution.
3.3.6 Crystallization point
The crystallization point of aluminium iron (III) sulfate varies, depending on the composition.
For example:
 13 °C for composition containing 36 g/kg of Al and 15 g/kg of Fe.
3.3.7 Specific heat
Not known.
3.3.8 Viscosity (dynamic)
The viscosity of aluminium iron (III) sulfate solution varies greatly, depending on the composition and content of
insoluble matters.
For a typical commercially available solution with a composition containing36 g/kg of Al and 15 g/kg of Fe, the
viscosity is given in Table 1.
Table 1 — Viscosity
Temperature Viscosity
(°C) (mPa·s)
- 5 62
0 49
10 29
3.3.9 Critical temperature
Not applicable.
3.3.10 Critical pressure
Not applicable.
3.3.11 Physical hardness
Not applicable.
3.4 Chemical properties
Aluminium iron (III) sulfate is a slightly acidic hydrated salt or solution. Very dilute solutions hydrolyze and form a
precipitate of aluminium hydroxide and iron hydroxide.
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.
3)
100 kPa = 1 bar.
4 Purity criteria
4.1 General
This document specifies the minimum purity requirements for aluminium iron (III) sulfate 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 products 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 lead 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 and iron ion contents) in the commercial product expressed as
grams per kilogram of product shall be within ± 3 % of the manufacturer's declared values.
NOTE The concentration of water-soluble aluminium and water-soluble iron in commercial products varies. Typical values
for concentration of active matter depending on the forms are given here below:
Al g/kg of product Fe g/kg of product
Solid forms 68 to 80 35 to 12
Solution forms 26 to 40 21 to 6
4.3 Impurities and main by-products
In solid hydrated forms, the content of insoluble matter shall not exceed:
• 25 g/kg of Al + Fe for type 1 and type 2;

• 30 g/kg in commercial product for type 3.
In solutions, the content of insoluble matter shall not exceed:
• 25 g/kg of Al + Fe for type 1 and type 2;

• 15 g/kg in commercial product for type 3.
NOTE 1 The three types are defined in Table 2.
NOTE 2 Insoluble matter consist of unreacted silica (SiO ) and/or aluminium and iron silicates, in various proportions.
4.4 Chemical parameters
The product shall conform to the requirements specified in Table 2.
Table 2 — Chemical parameters
Limit
mg/kg of Al + Fe
Parameter
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. 40 200 800
Antimony (Sb) max. 20 40 120
Selenium (Se) max. 20 40 120
-
NOTE Cyanide (CN ) is usually not relevant because of the acidity of the product.
Pesticides and polycyclic aromatic hydrocarbons are not relevant since the raw materials
used in the manufacturing process are free of them. For maximum impact of the product on
trace metal content in drinking water see A.2.
5 Test methods
5.1 Sampling
5.1.1 General
Observe the general rules of ISO 3165 and take into account ISO 6206.
5.1.2 Solid
Prepare the laboratory sample(s) required by the relevant procedure described in ISO 8213.
5.1.3 Liquid
5.1.3.1 Sampling from drums and bottles
5.1.3.1.1 General
5.1.3.1.1.1 Mix the contents of the container to be sampled by shaking the container, by rolling it or by rocking
it from side to side, taking care not to damage the container or spill any of the liquid.
5.1.3.1.1.2 If the design of the container is such (for example, a narrow-necked bottle) that it is impracticable
to use a sampling
...