— From Registration Pathway Adjustments to Full Lifecycle Management of New Pesticides
CHINA PESTICIDE REGISTRATION INSIGHT
As China's agrochemical industry expands beyond generic product registration to the development of new active ingredients and synchronized global registrations, the Chinese regulatory authorities are concurrently refining frameworks for new pesticide registration, data protection, and risk assessment. A draft revision of the Data Requirements for Pesticide Registration, along with supporting draft guidelines for the toxicological and environmental risk assessment of major metabolites, have been successively released for public comment.
Background: Registration is Shifting from "Completing Studies" to "Structuring Evidence"
The proposed changes in the draft revision of the Data Requirements for Pesticide Registration go beyond the addition or removal of individual studies. They place greater emphasis on whether the overall evidence package is scientifically coherent: whether the selected registration pathway is compatible with the product and commercial strategy; whether the quality of the technical material can be consistently maintained; how major metabolites are identified and assessed; and why existing data may be relied upon or certain studies may be waived.
Overall, the regulatory direction combines support for meaningful product and technology innovation with closer scrutiny of the completeness and scientific integrity of the evidence package. This article considers the implications of the proposed changes for new pesticide registrations, and the comprehensive lifecycle support provided by REACH24H as a Contract Regulatory Affairs Organization (CRAO, hereafter referred to as "regulatory consultancy").
1. Adjustments to the Regulatory Framework and Registration Pathways
For companies developing new pesticides, the most immediate implication is that registration pathways both within and after the six-year data protection period will need to be aligned earlier with R&D, manufacturing and commercial partnership strategies.
1.1 Within the Six-Year Period: A Clearer Distinction Between Two Registration Pathways
During the six-year data protection period, the draft explicitly delineates the prerequisites for the two distinct pathways: applications utilizing proprietary data and applications relying on authorized data.
The proprietary data pathway heavily emphasizes the completeness of the data and the seamless integration between the technical material (TC) and formulated product dossiers. The authorized data pathway entails more than simply obtaining a Letter of Access (LoA); it requires careful consideration of whether the authorization chain, the applicant entity, the production process, and the quality standards are mutually aligned.
Companies should therefore determine at an early stage which registration pathway they intend to follow and whether that pathway can support their longer-term product portfolio.
1.2. Post Six-Year Period: Market Access Remains Contingent on Product Quality and Manufacturing Capabilities
Expiry of the six-year period changes the conditions under which registration data may be used, but it does not lower expectations for product quality or manufacturing capability.
The quality level of the TC, process robustness, impurity profile, 5-batch analysis, and actual manufacturing conditions remain the foundational pillars for a successful registration. For later market entrants, the barrier to entry will primarily manifest in manufacturing and quality control capabilities, meaning competitive advantage cannot be built solely on waiting out the protection period.
1.3. Data Authorization and Registration Data Transfer: Distinctions in Data Rights and Commercial Consequences
Data authorization typically permits another party to use specified data within an agreed-upon scope, whereas data transfer may have broader implications for data rights, registration certificate ownership, and subsequent product control.
The two mechanisms therefore have different commercial consequences. During partnership negotiations, companies must concurrently address the products and uses covered, ownership of newly generated or improved data, quality liabilities, and protocols for partnership termination to prevent critical disconnects between commercial agreements and regulatory realities.
1.4. Chinese Common Nomenclature Rules and "Three-New" Formulation Registrations: Greater Emphasis on Substantive Innovation
New regulations regarding pesticide Chinese common nomenclature clarify that, in principle, a new strain of the same microbial species will no longer be assigned as a new active ingredient. This is likely to direct more R&D investment towards new microbial species and genuinely novel active substances.
However, the data requirements for new strains have not been reduced. Comprehensive characterization and risk profiling are still mandatory through strain identification, genomic information, comparative biological activity, and safety data.
Additionally, applications for new formulation types, new concentrations, and new mixtures will require a more robust justification of their scientific value and the registration rationale. Collectively, these changes reflect a regulatory trajectory that encourages high-value innovation while strengthening scientific oversight.
1.5. The Role of a Regulatory Consultancy: Translating Regulatory Rules into Viable Registration Pathways
The role of a regulatory consultancy extends beyond interpreting individual regulatory requirements at the submission stage. At the project initiation stage, it can assist the company in developing an actionable registration roadmap by clarifying the applicant, the relationship between TC and formulation projects, data sourcing, and rights allocations, and the relevant manufacturing processes, quality specifications, and production conditions. This approach helps keep regulatory strategies aligned with R&D timelines, partnership models, and broader product portfolios.
2. Changes to Data Requirements: More Detailed Metabolite Evaluation
2.1. Relocation of Metabolism Studies from Formulation Dossier to Technical Material Dossier
Under the current regulatory framework, plant and livestock metabolism data are primarily submitted as part of the formulated product dossier. Under the draft revision, these studies would move to the technical material dossier, while the requirements for the toxicological assessment, environmental fate, analytical methods and risk assessment of major metabolites would also become more detailed.
This change goes beyond the location of individual study reports; it dictates that metabolite identification and the associated follow-up assessments must be integrated into the TC data package and overarching project master plan at a significantly earlier stage.
2.2. Refined Evaluation Criteria for Major Metabolites
Taking chemical pesticides as an example, the toxicological assessment of major metabolites will evaluate evidence including genotoxicity, the threshold of toxicological concern (TTC), dietary exposure, and environmental exposure. Where the available evidence is insufficient to exclude a potential risk, acute, subchronic or other studies may be required.
Recent draft guidance on the toxicological and environmental risk assessment of pesticide major metabolites indicates that the evaluation framework for metabolites is progressively becoming highly specialized and detailed. However, the precise scope of metabolite identification and specific study triggers await further clarification in finalized documents and subsequent review practices.
Companies currently planning new pesticide registration studies should utilize these drafts as a framework for early-stage study design. The final scope of testing must be determined based on finalized regulations and scientific characteristics of the individual project.
2.3. Qualitative and Quantitative Mandates May Change Radiolabeling and Reference Standard Planning
Hydrolysis, aqueous photolysis and soil surface photolysis studies are expected to place greater emphasis on the qualitative and quantitative analysis of major metabolites. In scenarios characterized by numerous unknown degradates, insufficient recovery rates, or the need to achieve mass balance, radiolabeling may become a more pragmatic, if not indispensable, technical necessity. However, this should not be misconstrued as a blanket mandate for radiolabeling in all hydrolysis and photolysis studies. Specific triggers remain contingent upon the formal issuance of the Data Requirements for Pesticide Registration.
Where radiolabeling is required, applicants must meticulously coordinate the labeling position, custom synthesis and shipment of the test item, availability of metabolite reference standards, analytical methodologies, and test facility scheduling. The associated costs and timelines will cascade throughout the entire research and registration chain.
2.4. The Role of a Regulatory Consultancy: Bridging Studies and Risk Assessment at an Earlier Stage
As data requirements become more detailed, it becomes increasingly critical to establish the strategic logic connecting individual studies with broader registration requirements prior to study initiation. An expert regulatory consultancy can support the review of toxicology, environmental fate and metabolism study protocols; identify metabolites of potential concern; plan radiolabeled test items, reference standards and analytical methods; establish critical decision points where lower-tier studies trigger higher-tier testing; harmonize data interfaces across multiple test facilities; and mitigate overarching project risks and timeline bottlenecks.
For justifications regarding the registration necessity of new formulation types, new concentrations, and new mixtures, or for data waiver arguments across other registration types, the consultancy can construct a robust evidentiary narrative centering on efficacy, resistance management, dosage reduction, safety, and exposure. The objective is to ensure that each study contributes to a clearly defined regulatory conclusion.
3. How REACH24H Supports Full-Lifecycle Management of New Pesticides
Featuring an interdisciplinary team of regulatory and technical experts, REACH24H operates as the regulatory and scientific coordinator for new pesticide projects, integrating candidate compound screening, registration pathway selection, study design, risk assessment, and commercial planning into a cohesive project logic. We collaborate with GLP-certified facilities to manage studies and data, providing end-to-end regulatory and technical lifecycle services.
1) Candidate Compound and Project Initiation Phase
Utilizing information on compound structure, existing safety profiles, intended uses, and target markets, REACH24H can support early-stage safety assessment, data gap analysis and feasibility assessments of compounds registered in China and other countries and regions. This empowers companies to identify pivotal risks prior to massive testing investments.
2) Global Registration Strategy and Data Planning Phase
Leveraging a global service network spanning Europe, the Americas, and the Asia-Pacific, REACH24H delivers comprehensive compliance solutions for major agrochemical markets. By benchmarking core requirements across China, the EU, the US, Brazil, and other target jurisdictions, we coordinate test substances, representative uses, and localized trials. We assist in formulating overarching metabolite evaluation strategies, logically sequencing radiolabeling, reference standards, analytical method development, and subsequent toxicological and environmental evaluations to construct a robust multinational market access blueprint.
3) Study Execution, Dossier Submission, and Regulatory Review Phase
During project execution, REACH24H can audit study protocols, coordinate test facilities and sample logistics, manage critical project milestones, and conduct advanced risk assessments, dossier consistency checks, and support responses to regulatory inquiries.
Our role is to coordinate the data generated across different test facilities so that they form a coherent evidence package to support the registration application.
Conclusion
The revised Data Requirements for Pesticide Registration remain in the draft stage, but the overall regulatory trajectory is unequivocally clear: encouraging the R&D of novel active ingredients and scientifically valuable product innovations, while simultaneously fortifying oversight via stricter mandates on registration pathways, technical material quality, major metabolites, and the necessity and rationality of product registrations.
For agrochemical companies, integrating regulatory foresight, R&D, study execution, and commercial planning at the earliest possible stage can significantly mitigate the risk of late-stage data gaps, redundant testing, and avoidable delays. Early involvement of an experienced regulatory consultancy like REACH24H is instrumental in enabling innovative agrochemical companies to formulate scientifically sound market decisions efficiently, ultimately optimizing project timelines and overall development and registration investment.
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Discuss your registration pathway, data gaps and metabolite assessment needs with REACH24H before committing to major studies.
