What Is Technical Equivalence in Pesticide Registration? A Guide for Importers

When you prepare to switch pesticide active-ingredient suppliers, even if the new manufacturer provides the same active ingredient, CAS number, and concentration, you cannot automatically assume you can use this new source for existing registered products.

De reden is simpel: Pesticide registration focuses not only on the active ingredient, but also on its source, impurities, and whether these differences affect the product’s quality and risk assessment.

This is why technical equivalence matters in pesticide registration.

Pesticide importers, distributors, Registration Holders, and local registration companies must understand this concept. It can help you identify in advance the technical documentation and registration requirements that may be involved before switching active ingredient manufacturers, adjusting your supply chain, or developing new products.

However, one point must be clarified: Technical Equivalence does not mean that active ingredients from different sources are automatically interchangeable, nor does it imply that, once a technical equivalence evaluation is completed, the relevant finished formulation can necessarily be sold directly in the target market. Whether further applications, notifications, or updates to product authorizations are required depends on the local registration system and the specific product circumstances.

What Does Technical Equivalence Mean in Pesticide Registration?

Technical Equivalence is an evaluation based on technical data and scientific evidence that determines whether technical active ingredients in pesticides from different sources, or technical materials resulting from specific manufacturing changes, meet applicable equivalence requirements.

In the field of chemical pesticides, the evaluation typically focuses on the following aspects:

• Active Substance Identity: Whether the active ingredient’s chemical identity is consistent.
• Active Ingredient Content: Whether the active ingredient content meets applicable requirements.
• Impurity Profile: Whether the types, levels, and other relevant impurity characteristics differ significantly.
• Physicochemical Properties: Whether the relevant physicochemical properties meet applicable requirements.
• Hazard Information: Where necessary, whether relevant toxicological or other risk data support the equivalence determination.

Both FAO’s technical documentation for pesticide registration and the UK HSE’s Technical Equivalence Guidance emphasize that technical materials from different manufacturing sources must be evaluated against applicable scientific data and regulatory standards.

This means that even if two suppliers sell the same Active Ingredient, you cannot deem their technical active ingredients equivalent solely because the product names are identical.

Why Is the Same Active Ingredient Not Enough?

Suppose you are sourcing the Technical Active Ingredient for a fungicide.

Supplier A and Supplier B both offer the same active ingredient, and the product names and CAS numbers are identical.

However, the two manufacturers may use different manufacturing processes, starting materials, or impurity profiles.

These differences do not necessarily mean one product is non-compliant, but you must determine on a case-by-case basis whether they are technically and regulatory significant.

Vergelijkingsitems	Leverancier A	Leverancier B	What the Purchaser Needs to Verify
Active Substance Identity	Dezelfde	Dezelfde	Is de chemische identiteit consistent?
Declared Content	Voldoet aan specificaties	Voldoet aan specificaties	Does it meet applicable technical specifications?
Onzuiverheidsprofiel	Relevant data available	Further verification required	Are there any new or significant impurity differences?
Manufacturing Process	Known process	Kan afwijken	Does the process change affect the material’s technical characteristics?
Batch-analyse	Batch data available	Data completeness to be confirmed	Zijn de gegevens representatief?
Registratie Status	Source records already available	Nieuwe bron	Is an additional technical equivalence evaluation or registration procedure required?

This table shows that identifying the same active ingredient is only the starting point for comparison, not the final conclusion on equivalence.

When May Technical Equivalence Be Required?

When the source or manufacturing conditions of a technical active ingredient for pesticides change, you must determine whether a technical equivalence evaluation is required.

Specific requirements depend on the target market, but importers and registrants should pay particular attention to the following situations.

Change of Technical Active Substance Manufacturer

If the technical active ingredient originally sourced from Manufacturer A is now planned to be sourced from Manufacturer B, it is necessary to first confirm whether the new source has been approved by the relevant market and whether the existing product authorization permits the use of that source.

Do not simply verify whether the new supplier can provide a Certificate of Analysis (COA).

It is also necessary to confirm whether the technical documentation is sufficient to support the relevant source evaluation and whether an application or supplementary information needs to be submitted to local regulatory authorities.

Change of Manufacturing Site

A change in the manufacturing site within the same company may also affect the technical documentation and registration status of the existing source.

For example, a manufacturer may transfer the production of a technical active ingredient from one plant to another. Even if the company name, product name, and nominal specification remain unchanged, you must confirm whether local regulatory rules require re-evaluation or the filing of relevant change notifications.

The UK HSE’s Guidance on Sources of Active Substances in Pesticides lists a change in manufacturing site as one circumstance that requires consideration of a technical equivalence assessment. This is a specific requirement under the UK regulatory framework and should not be directly regarded as a regulation that applies identically in all countries.

Change of Manufacturing Process

Changes to the manufacturing process also warrant special attention.

Process adjustments may alter the impurity profile or other relevant properties of the technical material. Determine whether a technical equivalence assessment is needed based on the nature of the change, existing registration conditions, and the target market’s regulations.

If the new process is likely to generate new relevant impurities, or if existing impurity levels change significantly, further analysis is required to determine whether these differences affect the applicable quality and risk assessments.

Change in Manufacturing Scale

When transitioning from pilot-scale production to commercial-scale production, it is also necessary to confirm whether a re-review of the source documentation is required.

Data obtained under laboratory or pilot-scale conditions may not fully represent the commercial-scale manufacturing process.

However, this does not mean that all production-scale changes automatically trigger the same regulatory procedures. Importers should first confirm the specific requirements of the relevant regulatory authorities.

What Is Assessed During Technical Equivalence?

Technical equivalence assessment is not merely a comparison of two product specification sheets. Its core purpose is to determine, based on the applicable technical documentation, whether the differences between the new source and the reference source are of regulatory significance.

Active Substance Identity and Content

First, it must be confirmed whether the chemical identities of the two technical materials are consistent and whether the active substance content complies with the relevant technical specifications.

Two issues need to be distinguished here:

First, whether the product is indeed the declared active substance.

Second, whether the technical material’s content and other relevant quality characteristics meet the applicable requirements.
Even if the active substance content meets specifications, other factors that may affect the equivalence assessment must not be overlooked.

Impurity Profile and Relevant Hazards

Impurity evaluation is a critical component of technical equivalence.

Manufacturing processes, starting materials, and other production conditions may affect impurity composition and levels. Therefore, reviewers must determine, based on applicable evaluation procedures, whether the impurity profiles of different sources are sufficiently similar.
Belangrijke aandachtsgebieden kunnen zijn:

• The types and levels of known impurities;
• Newly discovered impurities;
• Impurities that may pose toxicological or other risks;
• Whether the impurity data are complete;
• Whether supplementary hazard assessment data are required.

Not every impurity difference will invalidate technical equivalence.

The key determination is whether these differences exceed the applicable acceptance criteria and whether the available evidence supports reasonable conclusions regarding quality and risk.

Fysisch-chemische eigenschappen

Depending on the applicable evaluation procedure, relevant physicochemical properties may also need to be compared.

These data are used to further confirm the characteristics of the technical material, rather than merely to increase the volume of the registration dossier.
Importers should ensure the data pertains to the correct source of the technical active pharmaceutical ingredient, the testing methods are clearly defined, and the data support the relevant evaluation.

Manufacturing Process and Source Information

Manufacturer information is also critical to the source evaluation.

Depending on the specific market and application pathway, the following may need to be provided:

• Name of the actual manufacturer;
• Manufacturing site;
• A description of the manufacturing process;
• Starting materials and related manufacturing information;
• Technische specificaties;
• Analytical methods;
• Analytical data for representative batches;
• Other supporting documents required by regulatory authorities.

The level of detail and document format required may vary by country. Importers should follow the target market’s actual requirements rather than mechanically requiring every supplier to provide the same set of documents.

What Is Five-Batch Analysis and Why Does It Matter?

Five-Batch Analysis is a technical document worth understanding when evaluating technical active pharmaceutical ingredients (APIs).
Simply put, it uses multiple representative production batches to help evaluate the active ingredient content, impurity profile, and batch-to-batch consistency of the technical material.
Its value lies not only in showing that a single batch of active pharmaceutical ingredient meets specifications, but also in helping reviewers understand the compositional characteristics of the technical material that the manufacturing source produces under actual production conditions.

What Should Importers Check in Five-Batch Data?

If the target market requires five-batch analysis data, the purchasing party should focus on verifying the following:

Verificatie-items	Wat moet er geverifieerd worden?
Batch Identity	Does each analyzed batch have a clear identification number?
Productiebron	Does the batch correspond to the correct manufacturer and production site?
Fabricage datum	Can you confirm the batch production date?
Productie schaal	Is the batch sufficiently representative?
Analytische resultaten	Are the data on active ingredients and relevant impurities complete?
Analytische methodes	Are the analytical methods clearly defined and compliant with applicable requirements?
Data consistentie	Have differences between batches been reasonably evaluated?
Data Ownership or Access	Does the applicant have the appropriate rights to use or access the data?

Speciale opmerking: The “five-batch analysis” is not a universal checklist with identical requirements for all countries or all application scenarios.

The UK’s HSE application guidelines explicitly address batch analysis data and manufacturing source information; however, other regulatory authorities may adopt different submission requirements, evaluation levels, or application procedures.

Therefore, the purchasing party should not simply require the supplier to “provide five-batch data,” but should first clarify the target market’s requirements, the intended use of the data, and whether the applicant has the right to use it.

Technical Equivalence vs. Registration by Equivalence

These two terms are related but should not be confused.

Technical Equivalence primarily focuses on evaluating technical equivalence based on the source of the technical active ingredient or specific manufacturing changes.

Registration by Equivalence, by contrast, is a registration pathway within the FAO’s registration strategy framework. It compares the pesticide to be registered with a reference product already registered in the target country to determine whether registration is possible under relevant equivalence principles.

Vergelijkende afmetingen	Technical Equivalence	Registration by Equivalence
Belangrijkste aandachtsgebieden	Source of the technical active ingredient and its related technical characteristics	Comparison between the product to be registered and the reference registered product
Primair doel	To determine whether the relevant technical documentation meets the applicable equivalence requirements	To determine whether the applicable equivalence registration pathway can be adopted
Typical Areas of Focus	Technical specifications, impurities, batch data, and relevant risk information	Reference product, relevant technical documentation, and applicable registration requirements
Is it equivalent to a full product registration?	Nee	It is a registration strategy, but local requirements must still be met
Is it applicable to all countries?	Nee	Nee

The FAO’s registration tool lists “Registration by Equivalence” as a separate registration strategy, while the UK HSE has a dedicated Technical Equivalence evaluation procedure for changes in the source of active ingredients in plant protection product authorizations.

This distinction matters for importers.

Even if a new source meets the relevant technical equivalence requirements, the finished formulation intended for sale will not automatically be registered.

Whether you need to add the source, submit a change application, or complete other registration procedures later depends on the target market’s rules.

Does Technical Equivalence Work the Same Way in Every Market?

Niet precies.

Different countries and regions may use different terminology, application forms, data requirements, review processes, and fee structures.

Therefore, importers cannot treat a technical equivalence conclusion accepted in one country as universal proof accepted by all other markets.

Verenigd Koninkrijk

The UK’s Health and Safety Executive (HSE) provides specific technical equivalence application and evaluation procedures for changes in the source of active ingredients in plant protection product authorizations.

Its guidance covers scenarios such as changes in manufacturing location, manufacturing processes, technical specifications, and production scale.

If a procurement project is intended for the UK market, you should verify the applicable regional requirements and determine whether the new source requires a formal evaluation or inclusion in the relevant product authorization.

Other Registration Markets

Other markets may employ different technical equivalence procedures or incorporate relevant requirements into broader product registration, change application, and data review processes.

For example, some markets may require the local registrant to first review existing registration dossiers, manufacturer information, and data access rights before determining whether a new application is necessary.

One cannot assume that a new source can be used directly in the target market simply because another source of the same active ingredient has been accepted in a different market.

For international procurement, first confirm the target country, the status of existing registrations, and the specific details of the proposed change before determining the applicable procedures.

What Should Importers Ask a Pesticide Manufacturer?

If you are considering switching active ingredient suppliers, it is not recommended to simply ask:

“Can you provide the technical equivalence documents?”This question is too general, as the required documents vary significantly by country.

A more effective approach is to first provide the project background, then ask the manufacturer to confirm what technical documentation and source information they can provide.

A Practical Supplier Checklist

Verificatie-items	Voorgestelde vragen om te stellen
Werkzame stof	Is the active ingredient from the new source identical?
Fabrikant	Who is the actual manufacturer, and where is the production site located?
technische specificaties	Are there clear, applicable technical specifications?
Onzuiverheidsprofiel	Is relevant impurity analysis data available?
Batch-analyse	Are representative batch data required by the target market available?
Productie-informatie	Can you provide applicable manufacturing process documentation?
Analytische methodes	Are the relevant analytical methods clearly defined?
Toegang tot data	Does the applicant have the right to use the required technical data?
Existing Source Status	Has the new source already been authorized and accepted for relevant products in the target market?
Registratieprocedure	Is it necessary to apply for, notify, or update product authorization?
Documentatiekloof	What documentation is currently missing?
Doorlooptijd en kosten	How might preparing and reviewing relevant documentation affect the project schedule?

Of these, the last two items are particularly important to confirm in advance.

If the new source lacks the necessary impurity data, batch analysis, or data access rights, the project may require additional documentation preparation and regulatory communication.

This does not mean the project cannot proceed, but potential workload and time risks should be identified before making a procurement decision.

To prepare a complete registration dossier, refer to Wat is een pesticidenregistratiedossier? to better understand the role of technical source data in the overall registration dossier.

What Happens After Technical Equivalence Is Established?

Completing the technical equivalence evaluation does not necessarily mean the entire product registration project is complete.

Importers also need to confirm subsequent registration requirements and whether they can legally use the new source for the products they plan to procure.

It is recommended to proceed in the following order.

Step 1: Confirm the evaluation results.

Verify whether the relevant source has already passed the applicable technical equivalence evaluation, and whether the evaluation results cover the manufacturers, production sites, and technical materials in the actual procurement project.

Step 2: Confirm product authorization relationships.

Confirm whether the existing product registration in the target market already includes this source, or whether additional applications, notifications, or amendments are required.

Step 3: Verify data usage rights.

Even if technical documentation exists, assume it is not automatically available for use by all applicants. Confirm whether a Letter of Access, Letter of Supply, or other applicable authorization documents are required.

Step 4: Verify product data consistency.

Check for any discrepancies between relevant product specifications, manufacturing sources, technical documents, and registration data that require resolution.

Step 5: Confirm procurement and supply terms.

Do not assume that a new source can be directly used for commercial products in the target market based solely on supplier declarations until the necessary regulatory procedures have been completed.

If you are comparing technical data from different manufacturers, you may refer to Technische documentatie voor bestrijdingsmiddelen: Wat kopers van een leverancier moeten opvragen for further guidance on the specific roles of COAs, product specifications, manufacturing data, and other technical documents.

How Does Technical Equivalence Affect Pesticide Procurement?

For importers, technical equivalence is not merely a technical task for the registrant; it can also impact supplier selection, procurement costs, delivery schedules, and long-term supply stability.

For example, your current supplier may be able to provide the technical active ingredient already used in a registered product, but at a higher price or with longer lead times.

Another manufacturer offers the same active ingredient at a more competitive price.

If the new source requires additional equivalence evaluations, data purchases, supplementary documentation, or registration amendments, comparing active ingredient prices alone may underestimate actual procurement costs.

Therefore, it is recommended to incorporate source evaluation into the supplier screening process.

Before making a final decision, you should at least confirm:

• Whether the new source is suitable for the target market;
• What technical and regulatory assessments are required;
• Whether the relevant documentation is already available;
• Whether there are any restrictions on data usage rights;
• What procedures must be completed to incorporate the new source into the product authorization;
• Whether these tasks will impact the planned procurement timeline;
• Whether the total cost of the alternative source still offers a commercial advantage.

If you are evaluating new pesticide manufacturers in China, you may refer to Hoe kies je een pesticidenfabrikant in China? to conduct a comprehensive evaluation based on the manufacturer’s credentials, technical documentation, product quality, and supply capacity.

A supplier’s ability to provide technical documentation does not mean the source has been approved by regulatory authorities. The purchasing party must still verify whether the documentation meets the target market’s actual requirements.

Veelgestelde Vragen / FAQ

Does the Same Active Ingredient Mean Two Technical Sources Are Equivalent?

Nee dat doet het niet.

The same active ingredient and CAS number only indicate consistency in the relevant chemical identity information; they cannot, on their own, prove that two technical materials meet the requirements for equivalence in terms of impurity profiles, associated risks, and other applicable evaluation criteria.

Is Technical Equivalence the Same as Pesticide Registration?

Nee.

Technical equivalence primarily addresses the equivalence evaluation of technical active ingredient sources or specific manufacturing changes. Full product registration may also cover formulation composition, uses, efficacy, residues, toxicology, environmental risks, and other applicable data.

Is Five-Batch Analysis Required in Every Country?

Not all markets and application scenarios have exactly the same requirements.

Some regulatory procedures require analytical data from representative batches; however, the target market’s regulations determine the number of batches, analytical parameters, data standards, and submission methods.

Can I Change My Pesticide Technical Supplier Without a New Registration?

Er is geen universeel antwoord.

In some cases, a technical equivalence evaluation or a source change procedure may be required; in other cases, existing source approvals or local regulations may allow for different procedures. Confirm the target market’s specific requirements first; do not base the determination solely on an identical active ingredient name.

Does Technical Equivalence Approval Apply to Every Country?

It does not apply automatically.

Whether one regulatory authority’s evaluation results can be used in other markets depends on local regulations, data requirements, recognition mechanisms, and the product’s specific authorization status.

Can a COA Prove Technical Equivalence?

Generally, it cannot serve as sole proof.

A COA primarily reports test results for a specific sample or batch. Technical equivalence may require more comprehensive information, including the manufacturing source, technical specifications, impurity profiles, batch analysis, and other applicable data.

Does Technical Equivalence Mean the Finished Formulation Is Automatically Approved?

Nee dat doet het niet.

The equivalence evaluation of the technical active pharmaceutical ingredient (API) source and the finished formulation’s product registration are distinct issues. Even if the technical source meets the applicable requirements, the relevant product authorization and local marketing conditions must still be confirmed.

Can a Supplier Prepare the Technical Equivalence File for the Importer?

The manufacturer may provide the required technical data and source information; however, the applicant must confirm whether the documentation is sufficient, whether it has the applicable rights to use the data, and how to submit the final application, based on the specific project and target market.

Discuss Technical Source and Registration Requirements With POMAIS

For pesticide importers, distributors, and local registration companies, clarify the product identity, target market, current registration status, and required technical documentation before switching technical active ingredient sources.

When working with international pesticide procurement clients, POMAIS can discuss active ingredients, concentrations, formulations, manufacturing sources, product specifications, technical documentation, and packaging requirements specific to individual products and procurement projects.

If you are evaluating a new source of technical active ingredient, we recommend preparing the following information in advance:

• Active Ingredient;
• Target country or region;
• Whether the existing product is already registered;
• Current manufacturer and the proposed replacement manufacturer;
• Whether the change involves the source of the technical active ingredient, the production site, or the manufacturing process;
• Existing technical documentation and known gaps in documentation;
• Expected purchase volume and planned delivery schedule.

This information helps both parties discuss technical documentation requirements, risks associated with the source change, and supply arrangements more accurately.

To discuss the supply and technical documentation for specific products, you may submit product information, target markets, and procurement requirements via Neem contact op met POMAIS.

Core Principle: Technical equivalence is not a simple comparison of product names between two suppliers, but rather an evidence-based evaluation of the source of the technical active ingredient and its associated quality and risk characteristics. Confirming the applicable registration procedures prior to procurement helps importers identify gaps in technical documentation earlier and reduces compliance risks when switching supply sources.