kSIST FprEN 14664:2026

• Abstract:

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

• Status: Not Published
• Public Enquiry End Date: 29-Sep-2025
• 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: 5020 - Formal vote (FV) (Adopted Project)
• Start Date: 04-Sep-2026
• Due Date: 23-Oct-2026
• Ref Project: FprEN 14664 - Chemicals used for treatment of water intended for human consumption - Iron (III) sulfate, solid

• Revises: SIST EN 14664:2023 - Chemicals used for treatment of water intended for human consumption - Iron (III) sulfate, solid
• Effective Date: 11-Dec-2024

Overview

kSIST FprEN 14664:2026 defines the key requirements, analytical methods, and safe handling practices for iron (III) sulfate, solid, used in the treatment of water intended for human consumption. Developed by SIST in alignment with CEN/TC 164, this European standard establishes the characteristics and minimum purity of iron (III) sulfate as a water treatment chemical, contributing to the production of safe and compliant drinking water.

Iron (III) sulfate, also known as ferric sulfate, is widely employed as a primary coagulant in municipal and industrial water treatment processes. The standard ensures that both suppliers and users follow best practices for product quality, safe use, and appropriate dosing to comply with safety and regulatory requirements across Europe.

Key Topics

• Product Identification: Details on naming, chemical structure, physical and chemical properties of iron (III) sulfate, solid.
• Commercial Forms: Iron (III) sulfate solid is provided as free-flowing granules or powder in various particle sizes.
• Physical Properties: Typically appears as greyish or yellowish granules or powder, with high solubility in water and bulk density varying by form.
• Purity and Quality Standards: Specifies minimum purity grades and types, including thresholds for iron (III), iron (II), insoluble matter, and trace metal content.
• Analytical Methods: Reference to EN 17215 for water treatment chemicals, outlining the required analytical and sampling methods to confirm compliance.
• Safe Handling: Normative instructions on safe handling, emergency procedures (first aid, spillage, fire), labelling, marking, transportation, and storage requirements.
• Product Labelling: Guidance for proper labelling in line with EU Directives, including hazard and precautionary statements and pictograms.
• Environmental & Health Impact: Information on the potential impact of trace metals on drinking water, with prescribed maximum concentrations to adhere to EU drinking water directives.

Applications

• Municipal Water Treatment: Iron (III) sulfate is extensively used in water treatment plants for the coagulation and removal of suspended solids, organic matter, and microorganisms during drinking water production.
• Industrial Water Treatment: Applied in various industrial water purification systems where removal of pathogens, color, or turbidity is essential.
• Process Optimization: The standard supports water treatment operators in selecting the correct grade, dosage, and means of application to achieve optimal coagulation and compliance with water quality standards.
• Safety Practices: Ensures health and environmental protection through guidelines on storage (to prevent humidity-induced degradation and inadvertent acid formation), emergency response, and equipment compatibility.

Benefits:

• Assures consistent product quality and safety for water intended for human consumption.
• Helps treatment facilities meet EU and national regulations for drinking water.
• Promotes best practices for the use, handling, transportation, and storage of iron (III) sulfate in solid form, reducing health and operational risks.

Related Standards

• EN 17215: Specifies analytical methods for iron-based coagulants in water treatment.
• Directive (EU) 2020/2184: Sets the quality requirements for water intended for human consumption in the European Union.
• Regulation (EC) No 1272/2008 (CLP Regulation): Covers classification, labelling, and packaging of chemical substances, including those used in water treatment.
• Other Iron-Based Coagulant Standards: For products like iron (III) chloride, referencing similar requirements for use in potable water treatment.

By aligning with kSIST FprEN 14664:2026, water treatment operators, manufacturers, and regulators ensure the safe, effective, and compliant use of iron (III) sulfate, solid, optimizing processes for clean and safe drinking water in line with the latest European standards.

SLOVENSKI STANDARD
oSIST prEN 14664:2025
01-september-2025
Kemikalije, ki se uporabljajo za pripravo pitne vode - Železov (III) sulfat, v trdnem
stanju
Chemicals used for treatment of water intended for human consumption - Iron (III)
sulfate, solid
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Eisen(III)sulfat,
fest
Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation
humaine - Sulfate de fer (III), solide
Ta slovenski standard je istoveten z: prEN 14664
ICS:
13.060.20 Pitna voda Drinking water
71.100.80 Kemikalije za čiščenje vode Chemicals for purification of
water
oSIST prEN 14664:2025 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 14664:2025
oSIST prEN 14664:2025
DRAFT
EUROPEAN STANDARD
prEN 14664
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2025
ICS 71.100.80 Will supersede EN 14664:2023
English Version
Chemicals used for treatment of water intended for human
consumption - Iron (III) sulfate, solid
Produits chimiques utilisés pour le traitement de l'eau Produkte zur Aufbereitung von Wasser für den
destinée à la consommation humaine - Sulfate de fer menschlichen Gebrauch - Eisen(III)sulfat, fest
(III), solide
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 164.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 14664:2025 E
worldwide for CEN national Members.

oSIST prEN 14664:2025
prEN 14664:2025 (E)
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 forms . 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 Melting 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 . 8
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 .10
6.1 Sampling .10
6.2 Analyses .10
7 Labelling - Transportation - Storage .10
7.1 Means of delivery .10
7.2 Risk and safety labelling according to the EU Directives .10
7.3 Transportation regulations and labelling .11
7.4 Marking .12
7.5 Storage .12
7.5.1 General .12
7.5.2 Long term stability .12
7.5.3 Storage incompatibilities .12
Annex A (informative) General information on iron (III) sulfate solid .13
oSIST prEN 14664:2025
prEN 14664:2025 (E)
A.1 Origin . 13
A.1.1 Raw materials . 13
A.1.2 Manufacturing process . 13
A.2 Quality of commercial product . 13
A.3 Use . 14
A.3.1 Function . 14
A.3.2 Form in which it is used . 14
A.3.3 Treatment dose . 15
A.3.4 Means of application. 15
A.3.5 Secondary effects . 15
A.3.6 Removal of excess product . 15
Annex B (normative) General rules relating to safety . 16
B.1 Rules for safe handling and use . 16
B.2 Emergency procedures . 16
B.2.1 First aid . 16
B.2.2 Spillage . 16
B.2.3 Fire . 16
Bibliography . 17

oSIST prEN 14664:2025
prEN 14664:2025 (E)
European foreword
This document (prEN 14664:2025) has been prepared by Technical Committee CEN/TC 164 “Water
supply”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 14664:2023.
prEN 14664:2025 includes the following significant technical changes with respect to EN 14664:2023:
— update of the information related to limit values in Table 2 and Annex A.

oSIST prEN 14664:2025
prEN 14664:2025 (E)
Introduction
With respect to 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
or 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.

oSIST prEN 14664:2025
prEN 14664:2025 (E)
1 Scope
This document is applicable to iron (III) sulfate solid used for treatment of water intended for human
consumption. It describes the characteristics of iron (III) sulfate solid and specifies the requirements and
the corresponding analytical methods for iron (III) sulfate solid and
...