EN 890:2004
(Main)Chemicals used for treatment of water intended for human consumption - Iron (III) sulfate liquid
Chemicals used for treatment of water intended for human consumption - Iron (III) sulfate liquid
This document is applicable to iron (III) sulfate liquid of various iron and/or acid contents (see 3.2) used for treatment of water intended for human consumption. It describes the characteristics of iron (III) sulfate liquid and specifies the requirements and the corresponding analytical methods for iron (III) sulfate liquid( analytical methods are given in Annex B) and gives information on its use in water treatment. It also determines the rules relating to safe handling and use of iron (III) sulfate liquid(see annex E) .
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Eisen (III) sulfat, flüssig
Diese Europäische Norm gilt für Eisen(III)sulfat mit unterschiedlichen Eisen- und/oder Säuregehalten (siehe 3.2) zur Aufbereitung von Wasser für den menschlichen Gebrauch. Sie beschreibt die Eigenschaften von Eisen(III)sulfat und legt die Anforderungen sowie die entsprechenden Prüfverfahren für Eisen(III)sulfat fest. Sie gibt Informationen für seine Anwendung in der Wasseraufbereitung.
ANMERKUNG Eine Übereinstimmung mit dieser Norm bedeutet keine gleichzeitige Annahme oder Zulassung des Produktes in einem der Mitgliedsländer der EU oder EFTA. Die Anwendung des in dieser Europäischen Norm beschrie-be-nen Produktes unterliegt den jeweiligen Regelungen der nationalen autorisierten Stellen.
Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Sulfate de fer (III) liquide
Le présent document est applicable au sulfate de fer (III) liquide de différentes teneurs en fer et/ou en acide (voir 3.2) utilisé pour le traitement de l'eau destinée à la consommation humaine. Il décrit les caractéristiques et spécifie les prescriptions et les méthodes d'analyse correspondantes du sulfate de fer (III) liquide et donne les informations pour son utilisation dans le traitement de l'eau (les méthodes d'analyse sont données à l'Annexe B). Il fixe également les règles générales relatives à la sécurité d'emploi et de manipulation du sulfate de fer (III) liquide (voir Annexe E).
Kemikalije, ki se uporabljajo za pripravo pitne vode - Železov (III) sulfat, v tekočem stanju
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-marec-2005
1DGRPHãþD
SIST EN 890:2000
.HPLNDOLMHNLVHXSRUDEOMDMR]DSULSUDYRSLWQHYRGHäHOH]RY ,,, VXOIDWYWHNRþHP
VWDQMX
Chemicals used for treatment of water intended for human consumption - Iron (III) sulfate
liquid
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Eisen (III)
sulfat, flüssig
Produits chimiques utilisés pour le traitement de l'eau destinée a la consommation
humaine - Sulfate de fer (III) liquide
Ta slovenski standard je istoveten z: EN 890:2004
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 890
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2004
ICS 71.100.80 Supersedes EN 890:1998
English version
Chemicals used for treatment of water intended for human
consumption - Iron (III) sulfate liquid
Produits chimiques utilisés pour le traitement de l'eau Produkte zur Aufbereitung von Wasser für den
destinée à la consommation humaine - Sulfate de fer (III) menschlichen Gebrauch - Eisen (III) sulfat
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 890:2004: 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.7
5 Test methods.9
6 Labelling - Transportation - Storage.12
Annex A (informative) General information on iron (III) sulfate liquid .14
Annex B (normative) Analytical methods .17
Annex C (informative) Reduction of Fe (III) on a silver column.33
Annex D (informative) Determination of cadmium, chromium, nickel and lead (inductively coupled
plasma optical emission spectrometry (ICP/OES)).34
Annex E (normative) General rules relating to safety.36
Bibliography .37
Foreword
This document (EN 890:2004) 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 890:1998.
Significant technical difference between this edition and EN 890:1998 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) expansion of annex A by addition of A.2 "Quality of commercial product" ;
c) deletion of annex F.
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 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.
1 Scope
This document is applicable to iron (III) sulfate liquid of various iron and/or acid contents (see 3.2) used for
treatment of water intended for human consumption. It describes the characteristics of iron (III) sulfate liquid and
specifies the requirements and the corresponding analytical methods for iron (III) sulfate liquid ( analytical methods
are given in Annex B) and gives information on its use in water treatment. It also determines the rules relating to
safe handling and use of iron (III) sulfate liquid (see annex E) .
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 ISO 3696, Water for analytical laboratory use – Specification and test methods (ISO 3696:1987).
ISO 3165, Sampling of chemical products for industrial use – Safety in sampling.
ISO 5790:1979, Inorganic chemical products for industrial use – General method for determination of chloride
content – Mercurimetric method.
ISO 6206, Chemical products for industrial use – Sampling – Vocabulary.
3 Description
3.1 Identification
3.1.1 Chemical name
Iron (III) sulfate, liquid .
3.1.2 Synonym or common names
Ferric sulfate liquor, red iron liquor.
3.1.3 Relative molecular mass
399,87.
3.1.4 Empirical formula
Fe (SO ) .
2 4 3
3.1.5 Chemical formula
Fe (SO ) .
2 4 3
1)
3.1.6 CAS Registry Number
10028-22-5.
2)
3.1.7 EINECS reference
233-072-9.
3.2 Commercial forms
Different classes of solution exist varying in iron content and acidity as classified in Table 1.
Table 1 — Different classes
Fe (SO ) Free H SO
Classes Fe (III) Density at 15 °C
2 4 3 2 4
c
Mass fraction Mass fraction g/ml
Mass fraction
in % in %
in %
Class A 11,20 to 11,80 40,00 to 42,14 < 1,00 1,49 to 1,53
Class B 11,20 to 11,80 36,10 to 39,24 a 1,45 to 1,47
Class C 8,40 to 8,80 30,00 to 31,43 10,00 to 11, 00 1,46 to 1,48
Class D 12,50 to 12,80 44,60 to 45,70 < 1,00 1,57 to 1,60
a
Class E 12,50 to 12,80 40,70 to 42,80 1,52 to 1,56
b
Class F 13,50 to 14,00 44,78 to 47,55 1,58 to 1,63
a 2-
Deficiency of SO , expressed as H SO , is a mass fraction of 3 % to 4 % of the product.
4 2 4
b 2-
Deficiency of SO , expressed as H SO , is a mass fraction of 2,5 % to 3,5 % of the product.
4 2 4
c 2-
Fe (SO ) by direct stoicheiometry with subtraction of calculated SO deficiency where appropriate on classes B, E and F.
2 4 3 4
3.3 Physical properties
3.3.1 Appearance
The iron (III) sulfate liquid is a red/brown solution.
3.3.2 Density
See Table 1.
3.3.3 Solubility (in water)
The iron (III) sulfate liquid is dilutable down to about a mass fraction of 1 % of Fe (SO ) . Below this concentration,
2 4 3
hydrolysis and formation of hydroxide will occur.
3.3.4 Vapour pressure
Not known.
1) Chemical Abstract Service Registry Number.
2) European Inventory of Existing Commercial Chemical Substances.
3)
3.3.5 Boiling point at 100 kPa
Higher than 100 °C.
3.3.6 Freezing point
Lower than – 15 °C.
3.3.7 Specific heat
Not known.
3.3.8 Viscosity (dynamic)
The viscosity of the commonly used solution varies in the range of 5 mPa.s to 130 mPa.s at 10 °C.
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
The solutions of iron (III) sulfate are acidic.
4 Purity criteria
4.1 General
This document specifies the minimum purity requirements for iron (III) sulfate liquid 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 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 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 product shall contain not less than a mass fraction of 30 % of Fe (SO ) and shall be within ± 3 % of the
2 4 3
manufacturer's declared values.
3) 100 kPa = 1 bar.
4.3 Impurities and main by-products
The product shall conform to the requirements specified in Table 2.
The concentration limits refer to Fe (III).
Table 2 — Impurities
Impurity Limit
Mass fraction of Fe (III) content
in %
Grade 1 Grade 2 Grade 3
Manganese max. 0,5 1 2
a
max. 2,5 2,5 2,5
Iron (II)
b
max. 0,3 0,3 0,3
Insoluble matters
a
Fe (II) has a lower coagulant efficiency compared to Fe (III).
Also hydrolysis of Fe (II) starts at pH value 8, and therefore Fe (II) can remain
into the water at lower pH values.
b
An excess of insoluble matters indicates the presence of foreign matter. Iron is
a component of the product will usually be removed in the treatment process.
4.4 Chemical parameters
The product shall conform to the requirements specified in Table 3.
The concentration limits are specified in milligrams per kilogram of Fe (III).
Table 3 – Chemical parameters
Limit in
Parameter
mg/kg of Fe (III)
Type 1 Type 2 Type 3
Arsenic (As) max. 1 20 50
Cadmium (Cd) max. 1 25 50
Chromium (Cr) max. 100 350 500
Mercury (Hg) max. 0,1 5 10
Nickel (Ni) max. 300 350 500
Lead (Pb) max. 10 100 400
Antimony (Sb) max. 10 20 60
Selenium (Se) max. 1 20 60
-
NOTE Cyanide (CN), 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 iron (III)
sulfate on trace metal content in drinking water see A.2.
5 Test methods
5.1 Sampling
5.1.1 General
Observe the general recommendations in ISO 3165 and take into account ISO 6206. Prepare the laboratory
sample required by the relevant procedure described in 5.1.2 and 5.1.3.
5.1.2 Sampling from drums and bottles
5.1.2.1 General
5.1.2.1.1 Mix the contents of each 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.
5.1.2.1.2 If the design of the container is such (for example, a narrow-necked bottle) that it is impracticable to
use a sampling implement, take a sample by pouring after the contents have been thoroughly mixed. Otherwise,
proceed as described in 5.1.2.3.
5.1.2.1.3 Examine the surface of the
...
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