prEN 17756
(Main)Fertilizers, liming materials and inhibitors - Determination of the chloride content
- Abstract
This document specifies references to methods for the determination of the chloride content in organic fertilizers, organo-mineral fertilizers, inorganic fertilizers, liming materials and inhibitors.
This document is applicable to fertilizing product blends where the blend is a mix of at least two of the following components: fertilizers, liming materials, soil improvers, growing media, inhibitors, plant biostimulants, and where the following category: fertilizers is the highest % in the blend by mass or volume, or in the case of liquid form by dry mass. If fertilizer is not the highest % in the blend, the European Standard for the highest % of the blend applies. In case a fertilizing product blend is composed only of inorganic products, the European Standard for inorganic fertilizers applies.
NOTE Variations in analytical methods for fertilizing product blends can lead to differing results as some components or matrix interactions can affect the outcome. Validation procedures have shown that developed standard methods are robust and reliable across diverse product compositions, but possible interferences and unexpected results when analysing fertilizing product blends are possible.
- Status
- Not Published
- Publication Date
- 30-Jan-2028
- Technical Committee
- CEN/TC 260 - Fertilizers and liming materials
- Drafting Committee
- CEN/TC 260/WG 7 - Chemical analysis
- Current Stage
- 4020 - Submission to enquiry - Enquiry
- Start Date
- 13-Aug-2026
- Due Date
- 13-Oct-2026
- Completion Date
- 13-Aug-2026
prEN 17756 is a draft European Standard from CEN on determining chloride content in fertilizers, liming materials and inhibitors. It tells users which test methods to apply for organic fertilizers, organo-mineral fertilizers, inorganic fertilizers, liming materials and inhibitors, and it links those test methods to EU fertilising product requirements.
The standard is aimed at laboratories, manufacturers, and conformity assessment users who need a clear route to measure chloride content consistently. In practice, it is a selection and application standard: it points to the right sampling, sample preparation and analytical documents for each product type.
What does prEN 17756 specify?
prEN 17756 specifies the references to methods for determining chloride content in the listed fertilizer-related products. It also sets out how the standard applies to fertilizing product blends and how the applicable method is chosen when more than one component is present.
The document is organized into:
- Clause 1 Scope
- Clause 2 Normative references
- Clause 3 Terms and definitions
- Clause 4 Sampling and sample preparation
- Clause 5 Determination of chloride content
- Annex ZA on the link with Regulation (EU) 2019/1009
- Bibliography
| Annex | What it covers |
|---|---|
| Annex ZA | Relationship between this European Standard and the essential requirements of Regulation (EU) 2019/1009 |
What are the key requirements of prEN 17756?
prEN 17756 is mainly a routing document: Clause 5 tells you which method to use for each product group, and Clause 4 tells you how to prepare the sample before analysis. For a user, that means the standard is used to choose the correct analytical path before any chloride measurement is reported.
Product coverage and blend rules
prEN 17756 applies to organic fertilizers, organo-mineral fertilizers, inorganic fertilizers, liming materials and inhibitors. It also applies to fertilizing product blends when the blend contains at least two listed components and fertilizers are the highest percentage by mass or volume, or by dry mass for liquid form. If fertilizer is not the highest component, the standard for the highest component applies; if the blend contains only inorganic products, the European Standard for inorganic fertilizers applies. In practice, this tells a laboratory which product family governs the test result.
Sampling and sample preparation
prEN 17756 states that sampling is not part of the method and points users to EN 1482-1 and EN 1482-3 for recommended sampling methods. Clause 4 requires sample preparation in accordance with EN 1482-2:2024. That matters because a representative, undamaged sample is needed for a result that reflects the product being assessed.
Analytical method selection
prEN 17756 requires prEN 17758:2026 for the determination of chloride content in fertilizers and liming materials. For inorganic fertilizers and liming materials in the absence of organic material, EN 16195 may be used. For inhibitors, prEN 18388:2026 shall be used. In practice, users do not develop their own procedure from scratch; they select the referenced method that matches the product.
Expression of results
prEN 17756 specifies that the mass fraction of chlorides, Cl, is expressed in g/kg. This matters for reporting, specification checks and comparison with regulatory limits or product claims.
EU conformity link
prEN 17756 includes Annex ZA, which links the normative clauses to Regulation (EU) 2019/1009. That means the standard is also a conformity tool for users working under the EU fertilising products framework.
What terms does prEN 17756 define?
prEN 17756 uses the terms and definitions from EN 12944-1:1999, EN 12944-2:1999 and EN 12944-3:2025.
- Organic fertilizers - fertilizers made from organic materials that fall within the scope of this standard.
- Organo-mineral fertilizers - fertilizers that combine organic and mineral constituents.
- Inorganic fertilizers - mineral-based fertilizers covered by the method references in this standard.
- Liming materials - products used to modify soil acidity and included here for chloride determination.
- Inhibitors - products included in the standard’s scope and tested with a dedicated referenced method.
- Fertilizing product blends - mixtures of at least two listed component groups, with the applicable standard chosen by the dominant component.
- Cl - the chloride mass fraction reported by the method, expressed in g/kg.
Who uses prEN 17756?
prEN 17756 is used by testing laboratories, fertilizer manufacturers, quality control teams, and conformity assessment bodies working with EU fertilising products. It is also relevant to technical and regulatory users who need a defensible chloride result for product release, verification, or market access.
What changed in prEN 17756 from the previous edition?
prEN 17756 will supersede CEN/TS 17756:2022. The foreword states these main changes: the technical specification has been adopted as a European Standard and now includes Annex ZA; chloride determination for inhibitors has been added to Clause 5; the scope has been updated; the normative references have been updated; and the bibliography has been updated.
Which standards are used with prEN 17756?
prEN 17756 uses several companion standards and references:
- EN 1482-2:2024 for sample preparation
- EN 1482-1 and EN 1482-3 for recommended sampling methods
- EN 12944-1:1999, EN 12944-2:1999 and EN 12944-3:2025 for terms and definitions
- prEN 17758:2026 for chloride determination in fertilizers and liming materials
- EN 16195 for chlorides in inorganic fertilizers and liming materials in the absence of organic material
- prEN 18388:2026 for chloride determination in inhibitors
What does the prEN 17756 document contain?
prEN 17756 contains a short framework for choosing and applying chloride test methods rather than a full standalone laboratory procedure. It includes scope, normative references, definitions, sampling and sample preparation guidance, the method-selection clause, and an informative Annex ZA.
Annex ZA provides a formal link between the standard and Regulation (EU) 2019/1009, including a correspondence table that identifies the covered essential requirements. The bibliography lists the legal act and the cited sampling and analytical standards used with this document.
Relations
- Effective Date
- 03-Jul-2024
Get Certified
Connect with accredited certification bodies for this standard
Control Union Certifications
Global certification for agriculture and sustainability.
ECOCERT
Organic and sustainability certification.
FSC International
Forest Stewardship Council certification.
Sponsored listings
Frequently Asked Questions
prEN 17756 is a draft published by the European Committee for Standardization (CEN). Its full title is "Fertilizers, liming materials and inhibitors - Determination of the chloride content". This standard covers: This document specifies references to methods for the determination of the chloride content in organic fertilizers, organo-mineral fertilizers, inorganic fertilizers, liming materials and inhibitors. This document is applicable to fertilizing product blends where the blend is a mix of at least two of the following components: fertilizers, liming materials, soil improvers, growing media, inhibitors, plant biostimulants, and where the following category: fertilizers is the highest % in the blend by mass or volume, or in the case of liquid form by dry mass. If fertilizer is not the highest % in the blend, the European Standard for the highest % of the blend applies. In case a fertilizing product blend is composed only of inorganic products, the European Standard for inorganic fertilizers applies. NOTE Variations in analytical methods for fertilizing product blends can lead to differing results as some components or matrix interactions can affect the outcome. Validation procedures have shown that developed standard methods are robust and reliable across diverse product compositions, but possible interferences and unexpected results when analysing fertilizing product blends are possible.
This document specifies references to methods for the determination of the chloride content in organic fertilizers, organo-mineral fertilizers, inorganic fertilizers, liming materials and inhibitors. This document is applicable to fertilizing product blends where the blend is a mix of at least two of the following components: fertilizers, liming materials, soil improvers, growing media, inhibitors, plant biostimulants, and where the following category: fertilizers is the highest % in the blend by mass or volume, or in the case of liquid form by dry mass. If fertilizer is not the highest % in the blend, the European Standard for the highest % of the blend applies. In case a fertilizing product blend is composed only of inorganic products, the European Standard for inorganic fertilizers applies. NOTE Variations in analytical methods for fertilizing product blends can lead to differing results as some components or matrix interactions can affect the outcome. Validation procedures have shown that developed standard methods are robust and reliable across diverse product compositions, but possible interferences and unexpected results when analysing fertilizing product blends are possible.
prEN 17756 is classified under the following ICS (International Classification for Standards) categories: 65.080 - Fertilizers. The ICS classification helps identify the subject area and facilitates finding related standards.
prEN 17756 has the following relationships with other standards: It is inter standard links to CEN/TS 17756:2022. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
prEN 17756 is associated with the following European legislation: EU Directives/Regulations: 2019/1009; Standardization Mandates: M/564, M/564 Amd 1, M/564 Amd 2. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
prEN 17756 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2026
Gnojila, sredstva za apnjenje in inhibitorji - Določanje klorida
Fertilizers, liming materials and inhibitors - Determination of the chloride content
Organische Düngemittel, organisch-mineralische Düngemittel, anorganische Düngemittel
und Kalkdünger - Bestimmung des Chloridgehaltes
Ta slovenski standard je istoveten z: prEN 17756
ICS:
65.080 Gnojila Fertilizers
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2026
ICS Will supersede CEN/TS 17756:2022
English Version
Fertilizers, liming materials and inhibitors - Determination
of the chloride content
Organische Düngemittel, organisch-mineralische
Düngemittel, anorganische Düngemittel und
Kalkdünger - Bestimmung des Chloridgehaltes
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 260.
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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17756:2026 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Sampling and sample preparation . 6
4.1 Sampling . 6
4.2 Sample preparation . 6
5 Determination of chloride content . 6
Annex ZA (informative) Relationship of this European Standard and the essential requirements
of Regulation (EU) 2019/1009 making available on the market of EU fertilising products
aimed to be covered . 7
Bibliography . 8
European foreword
This document (prEN 17756:2026) has been prepared by Technical Committee CEN/TC 260 “Fertilizers
and liming materials”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede CEN/TS 17756:2022.
CEN/TS 17756:2022:
a) The CEN Technical Specification has been adopted as a European Standard including the addition of
Annex ZA;
b) Determination of the chloride content in inhibitors added to Clause 5;
c) Scope (Clause 1) updated;
d) Normative references (Clause 2) updated;
e) Bibliography updated.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
For the relationship with EU Legislation, see informative Annex ZA, which is an integral part of this
document.
Introduction
Regulation (EU) 2019/1009 [1] lays down the rules on the making available on the market of EU
fertilizing products and the specific safety and quality requirements for the defined product function
categories (PFCs).
The specific safety and quality requirements in relation to the determination of chloride content in
organic fertilizers, organo-mineral fertilizers, inorganic fertilizers and liming materials are defined in this
document as well as normative references of the test methods to be used in order to measure the
compliance w
...