SIST EN 891:2023

Chemicals used for treatment of water intended for human consumption - Iron (III) chloride sulfate

This document is applicable to iron (III) chloride sulfate used for treatment of water intended for human consumption. It describes the characteristics of iron (III) chloride sulfate and specifies the requirements and the corresponding analytical methods for iron (III) chloride sulfate and gives information on its use in water treatment. It also determines the rules relating to safe handling and use of iron (III) chloride sulfate.

Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Eisen(III)chloridsulfat

Dieses Dokument ist anzuwenden für Eisen(III)chloridsulfat zur Aufbereitung von Wasser für den menschlichen Gebrauch. Es beschreibt die Eigenschaften von Eisen(III)chloridsulfat und legt die Anforderungen sowie die entsprechenden Analysenverfahren für Eisen(III)chloridsulfat fest. Es enthält Angaben für dessen Anwendung in der Wasseraufbereitung. Es legt darüber hinaus Regeln für die sichere Handhabung und Verwendung von Eisen(III)chloridsulfat fest.

Produits chimiques utilisés pour le traitement de l’eau destinée à la consommation humaine - Chlorosulfate de fer (III)

Le présent document s’applique au chlorosulfate de fer (III) utilisé pour le traitement de l’eau destinée à la consommation humaine. Il décrit les caractéristiques du chlorosulfate de fer (III) et spécifie les exigences et les méthodes d’analyse correspondantes. Il donne des informations sur son emploi dans le traitement de l’eau. Il définit également les règles relatives aux précautions d’emploi et de manipulation du chlorosulfate de fer (III).

Kemikalije, ki se uporabljajo za pripravo pitne vode - Železov (III) klorid sulfat

Ta dokument se uporablja za železov (III) klorid sulfat, ki se uporablja za pripravo pitne vode. Navaja značilnosti železovega (III) sulfata, določa zahteve in ustrezne analitične metode za železov (III) klorid sulfat ter podaja informacije glede njegove uporabe pri pripravi vode. Določa tudi pravila za varno ravnanje z železovim (III) klorid sulfatom in njegovo uporabo.

General Information

• Status: Published
• Public Enquiry End Date: 19-May-2020
• Publication Date: 10-Apr-2023
• ICS: 13.060.20 - Drinking water
• ICS: 71.100.80 - Chemicals for purification of water
• Technical Committee: IOVO - Water supply and waste water engineering
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 06-Apr-2023
• Due Date: 11-Jun-2023
• Completion Date: 11-Apr-2023
• Directive: TP262 - Uredba o pitni vodi
• Ref Project: EN 891:2023 - Chemicals used for treatment of water intended for human consumption - Iron (III) chloride sulfate

Relations

• Replaces: SIST EN 891:2005 - Chemicals used for treatment of water intended for human consumption - Iron (III) chloride sulfate
• Effective Date: 01-May-2023
• Revised: oSIST prEN 891:2025 - Chemicals used for treatment of water intended for human consumption - Iron (III) chloride sulfate
• Effective Date: 04-Dec-2024

Overview

EN 891:2023 (CEN) specifies requirements for iron (III) chloride sulfate used in the treatment of water intended for human consumption. The standard describes the chemical and physical characteristics of the commercial solution, sets minimum purity criteria and impurity notification rules, and gives guidance on safe handling, storage, labelling and transportation. EN 891:2023 supersedes EN 891:2004 and aligns product information with current EU safety and drinking-water regulations.

Key topics and technical requirements

• Scope and identification
  • Chemical name: Iron (III) chloride sulfate (also known as ferric chloride sulfate, ferric chloro sulfate, chlorinated copperas).
  • CAS No: 12410-14-9; EINECS: 235-649-0.
• Commercial form and physical properties
  • Available as a dark brown aqueous solution.
  • Typical density: ~1.5 g·cm‑3 at 20 °C.
  • Boiling point ~102 °C; freezing point lower than −10 °C.
  • Viscosity ~70 mPa·s at 10 °C.
  • Solutions are acidic and corrosive.
• Purity and composition
  • Typical product contains not less than a mass fraction of 37 % FeClSO4 (approximately 11 % Fe) and shall be within ±3 % of the manufacturer’s declared values.
  • Free acid content typically 0 % to 1 % (mass fraction).
  • Producers must notify users and authorities of any significant impurities or additives arising from raw materials or processes.
• Testing and analytical methods
  • Analytical methods were moved from this standard; EN 17215 is referenced for iron-based coagulant analysis.
• Safety and operational rules
  • Labelling, EU safety classification updates, transport and storage requirements (including long-term stability and incompatibilities) are specified.
  • Annex B covers emergency procedures: first aid, spillage and fire response.

Practical applications

• Primary use: as an iron-based coagulant in drinking-water treatment (coagulation/flocculation and related processes).
• Typical users and implementers:
  • Water utilities and treatment plant operators
  • Chemical manufacturers and suppliers of water-treatment coagulants
  • Environmental and public-health regulators
  • Laboratories performing conformity and quality testing
  • Safety officers and logistics teams managing transport and storage

Who should consult this standard

• Procurement teams specifying chemical quality for potable water treatment
• Technical designers selecting coagulants for treatment trains
• Compliance officers ensuring product safety labelling and transport
• Laboratories referencing standardised composition and notification requirements

Related standards and references

• EN 17215 - Chemicals used for treatment of water intended for human consumption - Iron-based coagulants - Analytical methods (referenced for testing).
• Relevant EU Drinking Water Directive requirements and current national regulations (EN 891:2023 notes that national rules remain applicable pending verifiable European criteria).

Keywords: EN 891:2023, iron (III) chloride sulfate, ferric chloride sulfate, water treatment standard, CEN, drinking water, coagulant, EN 17215, purity criteria, safety handling.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2023
Nadomešča:
SIST EN 891:2005
Kemikalije, ki se uporabljajo za pripravo pitne vode - Železov (III) klorid sulfat
Chemicals used for treatment of water intended for human consumption - Iron (III)
chloride sulfate
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Eisen
(III)chloridsulfat
Produits chimiques utilisés pour le traitement de l’eau destinée à la consommation
humaine - Chlorosulfate de fer (III)
Ta slovenski standard je istoveten z: EN 891:2023
ICS:
13.060.20 Pitna voda Drinking water
71.100.80 Kemikalije za čiščenje vode Chemicals for purification of
water
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 891
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2023
EUROPÄISCHE NORM
ICS 71.100.80 Supersedes EN 891:2004
English Version
Chemicals used for treatment of water intended for human
consumption - Iron (III) chloride sulfate
Produits chimiques utilisés pour le traitement de l'eau Produkte zur Aufbereitung von Wasser für den
destinée à la consommation humaine - Chlorosulfate de menschlichen Gebrauch - Eisen(III)chloridsulfat
fer (III)
This European Standard was approved by CEN on 25 December 2022.

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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 891:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Description . 6
4.1 Identification . 6
4.1.1 Chemical name . 6
4.1.2 Synonym or common names . 6
4.1.3 Relative molecular mass . 6
4.1.4 Empirical formula . 6
4.1.5 Chemical formula . 6
4.1.6 CAS Registry Number . 7
4.1.7 EINECS reference . 7
4.2 Commercial form . 7
4.3 Physical properties . 7
4.3.1 Appearance . 7
4.3.2 Density . 7
4.3.3 Solubility (in water) . 7
4.3.4 Vapour pressure . 7
4.3.5 Boiling point at 100 kPa . 7
4.3.6 Freezing point. 7
4.3.7 Specific heat . 7
4.3.8 Viscosity (dynamic) . 7
4.3.9 Critical temperature . 7
4.3.10 Critical pressure . 7
4.3.11 Physical hardness . 8
4.4 Chemical properties . 8
5 Purity criteria . 8
5.1 General . 8
5.2 Composition of commercial product . 8
5.3 The grade of the product . 8
5.4 The type of the product . 9
6 Test methods . 9
6.1 Sampling . 9
6.2 Analyses . 9
7 Labelling - Transportation - Storage . 9
7.1 Means of delivery . 9
7.2 Risk and safety labelling according to the EU Directives . 9
7.3 Transportation regulations and labelling . 10
7.4 Marking . 11
7.5 Storage . 11
7.5.1 Long term stability . 11
7.5.2 Storage incompatibilities . 11
Annex A (informative) General information on iron (III) chloride sulfate . 12
A.1 Origin . 12
A.1.1 Raw materials . 12
A.1.2 Manufacturing process . 12
A.2 Quality of commercial product . 12
A.3 Use . 14
A.3.1 Function . 14
A.3.2 Form in which it is used. 14
A.3.3 Treatment dose . 14
A.3.4 Means of application . 14
A.3.5 Secondary effects . 14
A.3.6 Removal of excess product . 14
Annex B (normative) General rules relating to safety . 15
B.1 Rules for safe handling and use . 15
B.2 Emergency procedures . 15
B.2.1 First aid . 15
B.2.2 Spillage . 15
B.2.3 Fire . 15
Bibliography . 16

European foreword
This document (EN 891:2023) 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 August 2023, and conflicting national standards shall
be withdrawn at the latest by August 2023.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 891:2004.
— removal of the analytical methods from this standard and addition of reference to EN 17215 as
analytical method standard;
— update of the information of risk and safety labelling of the product to comply with the new
regulations (see 7.2 and [2]);
— update of the information related to Drinking Water Directive.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
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 us
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