kSIST FprEN 890:2026

• Abstract:

  This document is applicable to iron (III) sulfate solution of various iron and/or acid contents (see 4.2) used for treatment of water intended for human consumption. It describes the characteristics of iron (III) sulfate solution and specifies the requirements and the corresponding analytical methods for iron (III) sulfate solution and gives information on its use in water treatment. It also specifies the rules relating to safe handling (Annex B) and describes the use of iron (III) sulfate solution (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: 28-Aug-2026
• Due Date: 16-Oct-2026
• Completion Date: 02-Sep-2026
• Ref Project: FprEN 890 - Chemicals used for treatment of water intended for human consumption - Iron (III) sulfate solution

• Referred By: SIST EN 17882:2024 - Food authenticity - DNA barcoding of meat derived from mammals and birds using defined mitochondrial cytochrome b and cytochrome c oxidase I gene segments
• Effective Date: 28-Jan-2026
• Referred By: SIST EN ISO 22753:2023 - Molecular biomarker analysis - Method for the statistical evaluation of analytical results obtained in testing sub-sampled groups of genetically modified seeds and grains - General requirements (ISO 22753:2021, Corrected version 2022-11)
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 18057:2025 - Food authenticity - Quantitation of roe deer DNA relative to mammalian DNA in meat and meat products by real-time PCR
• Effective Date: 28-Jan-2026
• Referred By: SIST EN ISO 11781:2025 - Molecular biomarker analysis - Requirements and guidance for single-laboratory validation of qualitative real-time polymerase chain reaction (PCR) methods (ISO 11781:2025)
• Effective Date: 28-Jan-2026
• Referred By: SIST EN ISO 17174:2024 - Molecular biomarker analysis - DNA barcoding of fish and fish products using defined mitochondrial cytochrome b and cytochrome c oxidase I gene segments (ISO 17174:2024)
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 17881:2024 - Food authenticity - DNA barcoding of bivalves and products derived from bivalves using a defined mitochondrial 16S rRNA gene segment
• Effective Date: 28-Jan-2026
• Referred By: SIST EN ISO 20813:2023 - Molecular biomarker analysis - Methods of analysis for the detection and identification of animal species in foods and food products (nucleic acid-based methods) - General requirements and definitions (ISO 20813:2019)
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 18033:2025 - Food authenticity - Quantitation of equine DNA relative to mammalian DNA in raw beef (meat)
• Effective Date: 28-Jan-2026
• Revises: SIST EN 890:2023 - Chemicals used for treatment of water intended for human consumption - Iron (III) sulfate solution
• Effective Date: 04-Dec-2024

kSIST FprEN 890:2026 is a CEN draft European standard for iron (III) sulfate solution used in treatment of water intended for human consumption. It specifies the product description, purity requirements, analytical methods, labelling, transport, storage, and safety rules for manufacturers, suppliers, and users of the coagulant.

What does kSIST FprEN 890:2026 specify?

kSIST FprEN 890:2026 applies to iron (III) sulfate solution with various iron and/or acid contents for water intended for human consumption. It covers one product form and sets out how to identify it, test it, label it, transport it, store it, and use it safely.

The document is organized into clauses on scope, normative references, terms and definitions, description, purity criteria, test methods, and labelling-transport-storage, followed by two annexes.

Annex	What it covers
Annex A	General information on iron (III) sulfate solution, including origin, quality of commercial product, and use
Annex B	General rules relating to safety, including first aid, spillage, and fire

What are the key requirements of kSIST FprEN 890:2026?

kSIST FprEN 890:2026 is mainly a product specification. The most important requirements are the composition and impurity limits, the test methods to verify them, and the handling and transport conditions needed to keep the product suitable for drinking water treatment.

Product description and purity

• Clause 4 identifies the product as iron (III) sulfate, solution, and gives the common names ferric sulfate liquor and red iron liquor. It also records identifiers such as the CAS Registry Number and EINECS reference, which helps users confirm they have the right chemical.
• Clause 5.2 says the commercial product typically contains not less than 30 % Fe (SO4)3 and should be within ±3 % of the manufacturer’s declared values. In practice, buyers and users need to check that the delivered concentration matches the declared strength.
• Clause 5.3 sets three grades with limits for manganese, Fe (II), and insoluble matters. This matters because impurity level affects coagulant performance and can indicate foreign matter in the product.
• Clause 5.4 sets three types with limits for arsenic, cadmium, chromium, mercury, nickel, lead, antimony, and selenium. These limits matter because the product is added to water, so trace metals must stay low enough for treated water quality targets.
• Clause 6 requires sampling and analysis by the methods in EN 17215. That gives a common testing route for conformity checks instead of ad hoc methods.

Use, delivery, and storage

• Annex A.3 says iron (III) sulfate solution is used as a primary coagulant, either as delivered or diluted. It notes that the treatment dose depends on raw water quality and is generally in the range of 4 g/m3 to 10 g/m3 expressed as Fe.
• Clause 7.1 requires delivery in tankers or containers made of suitable non-corrosive materials, and they must not have been used for another product unless specially cleaned. This helps avoid contamination of the chemical.
• Clause 7.2 and 7.3 cover hazard communication and transport classification, including UN 3264 and Class 8 requirements under ADR/RID, IMDG, and IATA. In practice, this tells logistics and safety teams how the product must be shipped and labelled.
• Clause 7.5 and Annex B address storage and emergencies. The product should be kept away from metals, alkalis, and oxidizing agents, and users should follow the first-aid, spillage, and fire instructions.

What terms does kSIST FprEN 890:2026 define?

kSIST FprEN 890:2026 does not list formal terms and definitions, but it uses several technical terms and identifiers that are important to read correctly.

• Fe (III) - trivalent iron, used as the basis for content and impurity limits in the document.
• Fe (II) - divalent iron, noted because it has lower coagulant efficiency than Fe (III).
• CAS Registry Number - a unique chemical identifier; for this product it is 10028-22-5.
• EINECS reference - the European chemical inventory reference; for this product it is 233-072-9.
• ADR/RID - the road and rail dangerous goods rules used for transport classification.
• IMDG - the maritime dangerous goods code used for sea transport.
• IATA - the air transport dangerous goods rules used for air shipment.

Who uses kSIST FprEN 890:2026?

kSIST FprEN 890:2026 is used by manufacturers, suppliers, water treatment plant operators, laboratories, and transport and storage personnel. It is also relevant to quality managers and buyers who need to specify product grade, type, and documentation for drinking water treatment. The safety instructions in Annex B are especially important for anyone handling the product on site.

What changed in kSIST FprEN 890:2026 from the previous edition?

The draft prEN 890:2025 states that it will supersede EN 890:2023. The European foreword says the significant technical changes are an update of the information related to limit values in Table 2 and Annex A.

Which standards are used with kSIST FprEN 890:2026?

kSIST FprEN 890:2026 refers to EN 17215 for the sampling and analytical methods used to test iron-based coagulants. It also cites Directive (EU) 2020/2184 when discussing drinking water quality context, and Regulation (EC) No 1272/2008 for classification and labelling practice.

What does the kSIST FprEN 890:2026 document contain?

kSIST FprEN 890:2026 contains product identification data, physical and chemical property notes, and purity criteria for grades and types. Clause 5 includes Table 1 for grade limits and Table 2 for type limits, while Clause 7 includes labelling and transport requirements. Annex A adds three trace-metal impact tables and practical guidance on use, dosing, and removal of excess product. Annex B gives the safety procedures for handling, first aid, spillage, and fire.

SLOVENSKI STANDARD
oSIST prEN 890:2025
01-september-2025
Kemikalije, ki se uporabljajo za pripravo pitne vode - Železov (III) sulfat, raztopina
Chemicals used for treatment of water intended for human consumption - Iron (III) sulfate
solution
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Eisen(III)sulfat-
Lösung
Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation
humaine - Sulfate de fer (III) liquide
Ta slovenski standard je istoveten z: prEN 890
ICS:
13.060.20 Pitna voda Drinking water
71.100.80 Kemikalije za čiščenje vode Chemicals for purification of
water
oSIST prEN 890:2025 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 890:2025
oSIST prEN 890:2025
DRAFT
EUROPEAN STANDARD
prEN 890
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2025
ICS 71.100.80 Will supersede EN 890:2023
English Version
Chemicals used for treatment of water intended for human
consumption - Iron (III) sulfate solution
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-Lösung
(III) liquide
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 890:2025 E
worldwide for CEN national Members.

oSIST prEN 890:2025
prEN 890:2025 (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 . 6
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 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 . 7
4.4 Chemical properties . 7
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 . 8
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) sulfate solution . 12
oSIST prEN 890:2025
prEN 890:2025 (E)
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 . 13
A.3.1 Function . 13
A.3.2 Form in which it is used . 13
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

oSIST prEN 890:2025
prEN 890:2025 (E)
European foreword
This document (prEN 890:2025) 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 890:2023.
prEN 890:2025 includes the following significant technical changes with respect to EN 890:2023:
— update of the information related to limit values in Table 2 and Annex A.

oSIST prEN 890:2025
prEN 890:2025 (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 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.

oSIST prEN 890:2025
prEN 890:2025 (E)
1 Scope
This document is applicable to iron (III) sulfate solution of various iron and/or acid contents (see 4.2)
used for treatment of water intended for human consumption. It describes the characteristics of iron
(III) sulfate solution and specifies the requirements and the corresponding analytical methods for iron
(III) sulfate solution and gives information on its use in water treatment. It also determines the rules
relating to safe handling (Annex B)
...