REACH & CLP for Agrochemicals: Safety Documentation

Photo: National Cancer Institute / Unsplash

The production of pesticide formulations and adjuvants is subject to strict legislative requirements that are constantly evolving. The REACH and CLP/GHS regulations establish a framework for the registration, evaluation, and labeling of chemical substances, with non-compliance potentially leading not only to legal penalties but also to risks to worker health or loss of customer trust. For agrochemical manufacturers, it is therefore essential not only to know the current requirements but also to be able to apply them to specific raw materials—from surfactants to solvents. How can safety data sheets be correctly prepared, mixtures classified, and compliance with European standards ensured?

REACH and Its Impact on Agrochemistry: Registration and Manufacturer Obligations

In agrochemistry, the REACH regulation plays a key role in ensuring the safety of chemical substances, including pesticides and adjuvants. Manufacturers and importers of these products must register every substance contained in a concentration exceeding 1 tonne per year with the European Chemicals Agency (ECHA). For pesticides and adjuvants, this means not only providing toxicological and ecotoxicological data but also assessing risks to humans and the environment throughout the entire product lifecycle. Registration requires detailed documentation, including studies on acute and chronic toxicity, biodegradability, and bioaccumulation. Special attention must be paid to substances with endocrine-disrupting properties or those that are persistent, bioaccumulative, and toxic (PBT).

For pesticide formulators, compliance with mixture regulations is also crucial. While the mixture itself does not need to be registered, all its components must meet REACH requirements. This includes adjuvants, which, although not active substances, may affect the efficacy or safety of the final product. Manufacturers should regularly update their registrations in line with new scientific findings and legislative changes to avoid penalties and ensure continuity of market supply.

CLP Regulation: Classification, Labelling, and Packaging of Pesticides

The CLP Regulation (Classification, Labelling and Packaging) harmonises the classification and labelling of chemical substances and mixtures in the EU according to the GHS (Globally Harmonised System). For agrochemistry, this means that every pesticide or adjuvant must be correctly classified based on its hazardous properties, such as toxicity, corrosivity, flammability, or environmental hazards. The classification determines which warning symbols, signal words ("Danger" or "Warning"), standard hazard statements (H-phrases), and safety instructions (P-phrases) must be included on the label.

Pesticide packaging must meet strict durability and safety requirements. For example, products with acute toxicity (categories 1–3) must be equipped with a child-resistant closure and a tactile warning for the visually impaired. It is also important to comply with rules on label size and placement to ensure information is easily readable and understandable. Incorrect classification or labelling may lead to product withdrawal from the market, so it is essential to regularly verify data accuracy and adapt documentation to new CLP requirements.

Photo: Cameron Witney / Unsplash

Safety Data Sheets (SDS) for Pesticides: Structure and Key Information

The Safety Data Sheet (SDS) is a fundamental document for communicating risks associated with pesticides and adjuvants. It must be prepared in accordance with Annex II of the REACH Regulation and contain 16 mandatory sections that provide comprehensive information on the chemical safety of the product. For agrochemicals, sections concerning hazard identification (Section 2), composition (Section 3), first aid measures (Section 4), and fire-fighting instructions (Section 5) are particularly important. Furthermore, details on physical and chemical properties (Section 9), stability and reactivity (Section 10), and ecotoxicological information (Section 12) must be included.

Manufacturers of pesticides must ensure that the SDS contains up-to-date data and is available in all languages of the countries where the product is marketed. For adjuvants, which are often not classified as hazardous, it is important to emphasize their role in the mixture and any synergistic effects with active substances. The SDS should be regularly reviewed, especially when there are changes in the product composition or new scientific findings. An incorrectly prepared safety data sheet can lead to legal complications and undermine customer trust.

Practical Tips for Preparing Documentation: From Laboratory to Market

Preparing safety documentation for pesticides and adjuvants requires a systematic approach. The first step is a thorough analysis of the product composition and identification of all substances subject to registration under REACH. For each substance, relevant toxicological and ecotoxicological data must be collected, either from publicly available sources or through in-house studies conducted according to standard test methods. It is also important to assess risks for various exposure scenarios, such as handling, application, or disposal of residues.

When preparing a Safety Data Sheet (SDS) and labels according to CLP, it is advisable to use specialized software that automatically generates the required information based on entered data. This minimizes the risk of errors and speeds up the process of updating documentation. For agrochemical products, testing the stability and compatibility of components is also crucial to prevent undesirable reactions during storage. Finally, it is necessary to ensure training for employees and distributors on the proper handling of products and interpretation of safety information, thereby enhancing safety and compliance with legislation throughout the supply chain.

Photo: Julia Koblitz / Unsplash

Specific REACH requirements for adjuvants and synergists in agrochemistry

Adjuvants and synergists, frequently used in combination with pesticides to enhance their efficacy, are subject to REACH registration just like active substances. The key difference lies in the fact that adjuvants are not biocidally active on their own but can influence the properties of the final formulation. Manufacturers must demonstrate that these substances are not hazardous to humans or the environment, even when combined with other components. The registration dossier must include detailed toxicological and ecotoxicological studies, including tests for acute toxicity, irritancy, and sensitization. Special attention must be paid to interactions with active substances, which may alter their behavior in soil or aquatic environments.

For adjuvants with low production volumes (up to 10 tonnes per year), simplified requirements apply, but even here, basic safety data must be provided. Manufacturers should collaborate with raw material suppliers to obtain the necessary information on chemical properties and substance behavior under real-world conditions. It is also important to monitor updates to the REACH annexes, which may introduce new testing requirements or restrict the use of certain substances. In the case of adjuvants with endocrine-disrupting properties, registration is more demanding and requires a more extensive data set.

Classification of Mixtures According to CLP: How to Proceed with Complex Pesticide Formulations

The classification of pesticide mixtures according to the CLP Regulation is more complex than for individual substances, as it must account for interactions between components. The first step is to identify the hazardous properties of each individual component according to CLP criteria, including their concentration in the mixture. For mixtures containing more than one hazardous substance, mixture classification rules are applied, which combine the effects of the individual components. For example, a mixture containing irritant and toxic substances may be classified as toxic if the sum of their concentrations exceeds the specified limits.

In complex formulations such as suspension concentrates or emulsifiable concentrates, it is also necessary to consider physico-chemical properties such as flammability or corrosivity. The CLP Regulation requires that classification be based on available data, and if this is not available, extrapolation or calculation methods may be used. Manufacturers should maintain detailed documentation of how the classification was performed, including the studies and methods used. It is also important to monitor updates to harmonised substance classifications, which may affect the classification of the entire mixture.

Validation and updating of safety data sheets (SDS) during the product life cycle

Safety data sheets (SDS) for pesticides and adjuvants are not static documents but must be regularly updated in line with new scientific knowledge or changes in legislation. Manufacturers are required to review SDS at least once every five years, but in practice, it is advisable to carry out revisions more frequently, especially if there are changes in the product composition, its classification, or method of use. Updates must reflect new hazard information, for example, if a substance has been included in the SVHC (Substances of Very High Concern) list under REACH.

SDS validation involves checking all sections, from hazard identification to instructions for safe handling and disposal. Particular attention should be paid to Section 11 (toxicological information) and Section 12 (ecological information), where new data may be required based on updated studies. Manufacturers should have a system in place to monitor changes in legislation and scientific knowledge, for example, using specialist databases or consulting toxicologists. It is also important to ensure that updated SDS are distributed in a timely manner to all product users, including distributors and end customers.

Unsure about documentation?

For every raw material in our portfolio, we provide complete safety data sheets and technical documentation in compliance with REACH and CLP. Our experts will advise you on selecting suitable components and specifications for your formulations – just get in touch. Contact us – or browse our catalogue of over 1,300 products right away.