Pesticide Storage Stability Data: What Importers Should Check Before Registration and Bulk Supply

If a pesticide has passed the Storage Stability Test, does that mean the product can be safely registered and purchased in bulk?

Not necessarily.

The purpose of Storage Stability Data is to help determine whether a pesticide formulation can continue to meet relevant quality standards under specified storage conditions.

However, for pesticide importers, distributors, and registrants, simply seeing a report marked “PASS” is not enough.

You need to know: Is the product being tested the one you plan to purchase? What storage conditions were used? What changes occurred before and after storage? Do the test results meet the product specifications? Is the packaging used representative?

If you are preparing for registration or bulk procurement, you can first check the following 10 items:

Audit Items	What You Need to Confirm
Product Identity	Are the active ingredient, concentration, and dosage form correct?
Formulation / Source	Do the tested formulation and relevant manufacturing sources match the project specifications?
Batch Number	Can the batch of the tested product be identified?
Storage Conditions	Are the storage temperature, duration, and testing conditions clearly specified?
Packaging	Do the test containers meet the study requirements and represent the intended commercial packaging?
Initial Results	Are there test results prior to storage?
Final Results	Are there corresponding test results after storage?
Test Methods	Are the applicable analytical and physical test methods specified?
Acceptance Criteria	What standards are used to determine if the results are acceptable?
Regulatory Requirements	Do these data meet the registration requirements of the target market?

This table serves as a starting point for a quick review and does not replace the destination country’s official data list.

For importers, the most important principle is:

The value of a stability report lies not in how many times it says “PASS,” but in whether it can demonstrate that the specific product meets the applicable quality requirements under clearly defined test conditions.

What is Storage Stability Data for pesticides?

Storage Stability Data refers to data obtained after evaluating the chemical or physical changes that occur in a pesticide product under specific storage conditions.

Simply put, it answers two questions:

After storage, has the active ingredient in the product undergone any unacceptable changes?

After storage, can the formulation still maintain the required physical and performance characteristics?

For example, an SC suspension concentrate may perform normally immediately after production.

However, after a period of storage, it may exhibit noticeable sedimentation, caking, changes in viscosity, or difficulty in redispersion.

Another SL product may initially appear as a uniform solution, but under unsuitable storage conditions, it may develop crystals or precipitates.

All of these issues can potentially affect product quality.

However, stability cannot be determined by visual inspection alone.

Even if there are no obvious changes in the product’s appearance, the active ingredient content or certain relevant chemical parameters may still change.

Therefore, a valuable stability study typically requires simultaneous consideration of the following factors based on the specific product:

• Active Ingredient Content
• Relevant Impurities
• Physical Properties
• Storage Conditions
• Packaging Compatibility
• Applicable Product Specification

It should be specifically noted that this article discusses the storage stability of the pesticide formulation itself.

This is distinct from Residue Storage Stability.

The latter primarily investigates whether pesticide residues remain stable during the storage of analytical samples prior to testing.

Since the subjects of these two studies are different, they should not be conflated.

What are the differences between the three common types of storage stability studies for pesticides?

Importers often see the following in supplier documentation:

• Accelerated Storage Stability
• Real-Time Storage Stability
• Low-Temperature Stability

These studies are not exactly the same tests and cannot simply be used interchangeably.

Test Type	Primary Purpose	What Buyers Should Know
Accelerated Storage Stability	Evaluates product changes under specified accelerated conditions	Determines whether the test temperature, duration, method, and results are applicable
Real-Time Storage Stability	Monitors the product under specified long-term storage conditions	Whether the data supports the expected shelf life
Low-Temperature Stability	To evaluate the product’s physical or chemical performance under low-temperature conditions	Whether adverse changes such as crystallization, precipitation, or separation occur

Accelerated Storage Stability: Accelerated Storage Stability

Accelerated Storage Stability typically uses controlled conditions, such as higher temperatures, to obtain product stability data within a shorter timeframe.

In the pesticide industry, 54°C for 14 days is one of the common accelerated storage test conditions.

However, it is important to note:

54°C for 14 days is not the only condition that must be used for all pesticide products or in all countries.

Some products may require different combinations of temperature and duration.

The specific protocol should take into account:

• Formulation Type
• Product Properties
• Applicable Test Method
• Regulatory Requirements
• Scientific Justification

For example, if a product is not suitable for higher temperature conditions, the relevant study may need to adopt other recognized protocols.

Importers are not required to design accelerated tests themselves.

However, they should at least know:

which protocol the supplier used and why that protocol is appropriate for this product.

Real-Time Storage Stability: Long-Term Storage Stability

Real-Time Storage Stability involves continuously monitoring changes in a product over a period of time under specified ambient temperature or actual storage conditions.

It provides more direct information on long-term stability.

Some pesticides perform well under accelerated conditions but may still encounter issues during actual long-term storage.

For example:

Certain formulations may exhibit slow caking, physical changes, or other issues after long-term storage that cannot be fully evaluated by short-term high-temperature testing alone.

Therefore, when a product poses specific stability risks or when the target regulatory authority requires long-term data, a Real-Time Study should be further considered.

Purchasers should not simply view “Accelerated Study” and “Real-Time Study” as two interchangeable document names.

Low-Temperature Stability: Low-Temperature Stability

If your target market experiences cold winters, or if the product may be exposed to low temperatures during transportation and storage, low-temperature stability is also a concern.

This is especially true for certain liquid formulations.

The following issues may arise under low-temperature conditions:

• Crystallization
• Precipitation
• Phase Separation
• Viscosity Changes
• Other Physical Instability

However, not all liquid pesticides should be considered to pose the same low-temperature risks.

Whether specific low-temperature testing is required, and what acceptance criteria apply, should be determined based on the product and relevant requirements.

For orders entering markets such as Kazakhstan, Uzbekistan, and Russia, buyers typically need to pay closer attention to the seasonal storage conditions at the destination.

However, actual packaging and stability requirements should still be determined by the specific product and local regulations, rather than simply applying a uniform testing protocol based on country name.

What should you check first after receiving a Storage Stability Report?

This is the most critical part of the entire review process.

It is not recommended to start with the “Conclusion” on the last page of the report.

A more reasonable approach is:

First verify the product, then verify the test conditions, next review the results before and after storage, and finally determine whether the conclusion is valid.

1. Verify Product Identity First

First, check whether the product name in the report matches your procurement or registration project.

At a minimum, you should verify:

• Active Ingredient
• Concentration
• Formulation
• Formulation Version (if applicable)
• Manufacturer / Source Information (if applicable)
• Product or Sample Identification

For example, you intend to register:

Imidacloprid 200 g/L SL

But the supplier provided:

Imidacloprid 350 g/L SC

Clearly, this report cannot be directly used as stability data for the target product.

Even if the active ingredient is exactly the same in both documents, this does not necessarily mean they belong to the same formulation product.

Another example:

Both documents list “Azoxystrobin 250 g/L SC,” but if the formulation composition or related manufacturing conditions differ, further evaluation is needed to determine the applicability of the study.

Therefore, do not simply ask:

“Do you have a stability report for Azoxystrobin?”

Instead, you should ask:

“Does this report correspond to the exact formulation I intend to register and purchase?”

2. Check the Batch Number and Sample Information

The report should clearly identify the sample or batch that was tested.

This may include:

• Batch Number
• Sample Identification
• Manufacturing Date
• Batch Size (as required)
• Study Sample Details
• Relevant Formulation Reference

This information helps you confirm exactly which product batch the study pertains to.

It also helps registration personnel determine whether the sample is appropriately representative.

However, please note:

The batch used in the storage stability study is not necessarily the same as the commercial batch for future export orders.

A link between the two must be established through product identity, specifications, and the quality control system; it is not mandatory to require that all commercial orders use the exact same batch number as the one used in the study.

3. Review Storage Conditions

A report that states:

“Storage Stability Passed”

but does not specify the storage conditions makes it difficult to directly assess its technical value.

At a minimum, the following should be confirmed:

• Temperature
• Storage Duration
• Relevant Environmental Conditions
• Study Protocol
• Test Method
• Any Deviations from the Planned Conditions

For example:

A report specifying 54°C for 14 days provides clearer study information than one that simply states “high-temperature storage test.”

However, having complete test conditions does not automatically prove that the study meets a specific country’s registration requirements.

It is also necessary to verify whether these conditions are applicable to the specific product.

4. Review Packaging

Stability studies are not only related to the chemical formulation but may also involve the container and closure system.

Therefore, the report should specify the following based on applicable requirements:

• Container Material
• Container Type
• Closure / Seal
• Relevant Packaging Construction
• Sample Packaging Details

If one type of packaging is used during testing but a different type is used for subsequent commercial orders, it is necessary to evaluate whether the differences between the two will affect the study conclusions.

For example, the fact that a product remains stable in a glass laboratory container does not automatically prove that it will perform the same way in another type of plastic packaging that has not been evaluated.

Similarly, it cannot be assumed that changing the cap or inner seal will never affect stability.

The product and packaging should be evaluated as an interconnected system.

5. Review the Initial Results and Final Results

This is the most critical part of the report review.

You need to know:

What condition the product was in at the start of testing.

What changes occurred after the test concluded.

For example:

Test Parameter	Before Storage	After Storage	Assessment
Active Ingredient Content	View Initial Results	View Final Results	Compliance with Applicable Standards
Appearance	Record Initial Condition	Record Condition After Storage	Any Abnormal Changes
pH (if applicable)	Initial Test Results	Final Test Results	Compliance with Specified Range
Physical Stability	Initial Relevant Parameters	Post-Storage Relevant Parameters	Compliance with Acceptance Criteria
Packaging Condition	Initial Container Condition	Container Condition After Storage	Did any adverse changes occur?

The table above is merely a schematic representation of the report structure; it does not contain actual product test values and cannot serve as a criterion for determining the compliance of any product.

I recommend that purchasers pay special attention to the following:

Whether the report actually provides comparable data, rather than merely stating “meets requirements.”

However, one should not mechanically require that every test item present data in exactly the same format before and after storage.

Ultimately, the applicable research methods, product specifications, and regulatory requirements should prevail.

6. Review Test Methods

Different test methods may yield different results for the same parameter.

Therefore, reports should specify the applicable analytical and physical test methods as needed.

For example:

• CIPAC Methods
• Validated Analytical Methods
• Registered Methods
• Other Accepted Procedures

For Accelerated Storage Testing, attention must also be paid to the version of the CIPAC method.

CIPAC MT 46.4has replaced the older MT 46.3 for new method proposals.

However, some existing product specifications or regulatory guidelines may still reference MT 46.3.

Therefore, a more professional review approach is:

to confirm which version of the method was used in the report and determine whether it is accepted by the target regulatory authority or relevant product specifications.

Data should not be automatically deemed invalid simply because the report uses an earlier method number.

7. Review Acceptance Criteria

Finally, it is also necessary to answer:

Based on what criteria was the product determined to be compliant?

This may involve:

• Registered Product Requirements
• Applicable FAO/WHO Specifications
• Relevant National Standards
• Agreed Product Specification
• Other Justified Acceptance Criteria

There is a common point of confusion here.

In some systems, the release specifications for a product prior to storage may differ from the acceptance limits it must meet at the end of its specified shelf life.

Therefore, one should not immediately judge a product as non-conforming simply because a particular test value has decreased.

Nor should one automatically accept results simply because the supplier has written “PASS” when the results have changed.

Judgment must be made in conjunction with the specified acceptance criteria, test methods, and specific evaluation requirements.

For procurement projects that have not yet established formal product standards, you may first refer to POMAIS’s Guidance on Setting Pesticide Product Specifications.

What stability parameters should be considered for different pesticide formulations?

Since the physical properties of different formulations vary, storage stability studies cannot use an identical list of parameters.

Purchasers do not need to be formulation engineers, but they should be aware of the quality issues most commonly overlooked for each formulation type.

Formulation	Typical Areas of Concern	What Buyers Need to Assess
SC	Suspensibility, Wet Sieve, Viscosity, Sedimentation	Are suspension and redispersibility still acceptable after storage?
EC	Emulsion Characteristics, Crystallization, Chemical Stability	Do the emulsion and chemical quality meet requirements after storage?
SL	Solution Stability, Precipitation, Crystallization	Does the active ingredient remain in a suitable dissolved state?
WP	Wettability, Suspensibility, Moisture, Caking	Does the powder still exhibit the required dispersibility after storage?
WG / WDG	Dispersibility, Moisture, Granule Condition, Caking	Do the granules maintain the specified physical quality?
OD	Dispersion Stability, Sedimentation, Pourability	Are there any unacceptable changes in the oil-in-water emulsion system?
EW	Emulsion Stability, Phase Separation, Viscosity	Does the emulsion system remain in a usable condition?
FS	Suspension Properties, Viscosity, Relevant Seed-Treatment Characteristics	Whether the product still meets the requirements for seed treatment formulations after storage

These are typical areas of quality concern and are not uniform, mandatory testing items for all products.

For example, if an SC stability report only includes Active Ingredient Content but completely lacks an evaluation of the physical quality of the applicable suspension system, it warrants further verification to determine whether it meets the relevant specification requirements.

Similarly, if an SL report only provides the product’s color but lacks applicable chemical or solution stability information, it may be insufficient to address the purchaser’s questions.

However, it is important to emphasize:

The parameters applicable to the actual product should be verified, rather than including all test items from other formulation types in the report.

In addition, microbial pesticides may involve live bacterial counts, viability, and other product-specific stability requirements.

The high-temperature accelerated testing conditions used for all conventional chemical pesticides cannot be directly applied.

Does passing a 54°C, 14-day test prove a two-year shelf life?

This is a common misunderstanding in pesticide procurement.

First, the conclusion:

Passing a 14-day accelerated stability test at 54°C does not guarantee that the product will remain free of quality issues for two years under all conditions.

Such tests can provide important evidence for stability evaluation.

However, the final assessment must still take the following factors into account:

• Product properties
• Test protocol
• Test results
• Physical and chemical stability
• Packaging conditions
• Expected storage conditions
• Applicable regulatory requirements
• Whether additional supporting data is required

For example, a product may pass a high-temperature accelerated test but experience gradual caking during long-term storage.

Another product may encounter issues in a low-temperature transport environment, a risk that high-temperature testing does not fully cover.

Therefore, it is not possible to infer from a single accelerated test that:

“The product will definitely remain stable for two years in any country, any packaging, and any storage environment.”

How exactly should shelf life be determined?

A more reasonable understanding is:

Shelf life should be established based on applicable stability data and relevant evaluation requirements.

For importers, what truly needs to be confirmed is:

1. What is the declared shelf life of the product?
2. What research data supports this declaration?
3. Is the data specific to the exact formulation?
4. Is the packaging used representative?
5. Are the corresponding storage conditions specified?
6. Does it comply with the requirements of the target country?

Therefore, rather than directly asking:

“Does your product have a two-year shelf life?”

a more professional question would be:

“What stability data support the proposed shelf life of this formulation?”

Will a change in packaging affect the storage stability data?

It might.

For example:

The supplier’s original stability study used a specific type of HDPE packaging.

However, your private-label order plans to switch to bottles made of a different material or change the cap and seal design.

Even if the product’s active ingredient, concentration, and formulation remain unchanged, you should verify whether the original stability data is still valid.

Factors to consider include:

• Container Material
• Closure System
• Sealing
• Permeation
• Chemical Compatibility
• Packaging Size
• Storage Environment

For example, certain solvent-based formulations may have specific requirements regarding packaging materials or closure systems.

For some water-based formulations, the logic for evaluating compatibility between packaging materials may differ.

However, it cannot be simply stated that:

“Whenever packaging is changed, all products must undergo a complete stability study.”

Nor should it be assumed that:

“Since it is merely a change in the bottle, no evaluation is necessary.”

The correct approach is:

Determine whether supplemental stability data is required based on the specific formulation, packaging changes, existing data, and the registration requirements of the target country.

For private label and OEM projects, it is recommended to resolve this issue before formal printing and batch filling.

How is Storage Stability Data Used for Pesticide Registration?

For registration projects, the first step is to confirm what data the regulatory authority in the target country requires.

Different countries may have varying requirements in the following areas:

• Accepted Test Methods
• Study Conditions
• Product Identity
• Packaging Information
• Data Format
• Supporting Studies
• Registration Pathway

Therefore, a stability report that supports registration in one country does not necessarily automatically meet the requirements of another country.

Registration data must correspond to the exact product

For example:

You plan to register:

Azoxystrobin 250 g/L SC

In that case, the stability data should support this exact product identity.

If existing reports pertain to different concentrations, different formulations, different formulation versions, or involve significant differences in manufacturing sources, it is necessary to evaluate whether these data can be used.

One cannot assume that the data is applicable simply because the active ingredient is the same.

Stability data is only part of the dossier

Storage stability data can be an important component of the registration dossier.

However, it cannot replace:

• Product Identity
• Composition
• Product Specification
• Analytical Methods
• Analytical Methods
• Toxicology
• Ecotoxicology
• Residues
• Efficacy
• Label Information

These other potentially required elements.

Therefore, importers do not need to duplicate the entire registration dossier here.

If you need to understand the overall structure of the Registration Dossier, you can read more at What Is a Pesticide Registration Dossier?.

Who has the authority to determine whether the data is acceptable?

Ultimately, this determination rests with the relevant regulatory authority in the target market, based on applicable regulations.

Manufacturers can provide research data and technical support.

Local registration firms can handle data compilation and submission.

However, a supplier’s unilateral statement:

“This report is valid for global registration,”

This does not replace the regulatory authority’s review.

For importers, a better question to ask is:

Do these stability data meet the requirements of the specific product I intend to register and those of the local regulatory authority?

What is the relationship between Storage Stability Data and batch procurement?

This is an aspect that many buyers tend to overlook.

The stability studies used for registration should not be completely disconnected from subsequent commercial supply.

You need to confirm:

There is reasonable consistency between the product for which stability evidence was obtained and the product that will actually be manufactured and sold in the future.

However, this does not mean that a complete long-term stability study must be repeated for every commercial batch.

The entire process can be understood as follows:

Approved Formulation

↓

Storage Stability Evidence

↓

Confirmed Product Specification

↓

Representative Sample Approval

↓

Commercial Production

↓

Batch Quality Control

↓

COA and Shipment Verification

Registration Stability Study Is Not the Same as a Batch COA

A registration stability study is primarily used to evaluate a product’s storage performance under specified conditions.

A Batch COA, on the other hand, primarily records the test results for a specific commercial batch.

They are not the same document.

A commercial batch COA does not automatically substitute for a long-term stability study.

Similarly, a product stability report does not prove that every future commercial batch has passed the necessary release testing.

How can a purchaser verify that the bulk product is consistent with the evaluated product?

Recommended considerations:

• Active Ingredient
• Concentration
• Formulation
• Relevant Composition
• Manufacturing / Source Changes
• Product Specification
• Packaging
• Batch QC
• Traceability

If this is the first commercial order, you should also verify that sample approval and product specifications have been finalized.

For specific procedures, please refer to POMAIS’s Guidelines for Pesticide Sample Testing Prior to Bulk Purchase.

Why is Change Control Required for Repeat Orders?

Some quality issues do not occur in the first batch of products but rather after subsequent changes.

For example:

• Changes to the technical source
• Replacement of a formulant
• Changes to formulation ratios
• Significant changes to the manufacturing site
• Changes to packaging materials
• Updates to product specifications

Not all of these changes necessarily lead to product instability.

However, they may affect the applicability of the original stability studies.

Therefore, significant changes should undergo proper evaluation, and the need for supplemental testing or re-approval should be determined in accordance with the contract and local regulations.

This is more practically feasible than simply requiring the supplier to:

“Ensure that every batch is exactly the same going forward.”

What should be done when an incomplete Storage Stability Report is received?

Not every report lacking information necessarily indicates a problem with product quality.

However, if key fields are missing, the purchaser cannot make a reliable assessment.

I recommend first categorizing the issue.

Issues Identified	Recommended Next Steps
Unclear Product Identity	Request confirmation of the exact product, concentration, dosage form, and formulation
No Batch Number	Request additional samples or batch identification information
No Storage Conditions	Request temperature, duration, and study protocol
No Packaging Information	Confirm the relationship between test containers and commercial packaging
Initial Results Missing	Confirm study methodology and whether verifiable baseline data exist
Only “PASS” listed; no test results provided	Request complete study documentation or an applicable technical summary
No Acceptance Criteria	Confirm the quality specifications used and the basis for evaluation
Test method is unclear	Request method number, version, or other necessary details
Report corresponds to an old formulation	Evaluate whether the old data is still applicable
The target country does not accept the existing data	Supplement applicable data as required by the regulatory authority

Do not rush to reject the product, nor approve the purchase outright

If the report contains gaps, the correct sequence of action is:

Identify the Gap → Request Clarification → Review the Evidence → Decide the Next Step

For example:

The absence of packaging information does not necessarily mean the product is unstable.

However, before confirming the representativeness of the packaging, the report should not be directly applied to all packaging options.

Similarly, if the supplier has only provided a summary of the stability report, but local registration requirements call for complete study data, the scope of available information must be further confirmed.

For critical registration and bulk production projects, involve local registration personnel, quality personnel, or an appropriate laboratory in the review.

Pesticide Storage Stability Data Review Checklist

The table below can serve as a practical checklist for importers and suppliers when verifying technical documentation.

Review Items	Issues to Verify
1. Exact Product	Does it correspond to the exact active ingredient, concentration, and dosage form?
2. Formulation Identity	Can the version of the formulation tested be confirmed?
3. Batch Identification	Is there clear sample or batch identification information?
4. Manufacturing Information	Can the relevant manufacturing source be confirmed when necessary?
5. Study Type	Is it an Accelerated, Real-Time, or Low-Temperature Study?
6. Storage Conditions	Are the temperature, duration, and related conditions clear?
7. Packaging	Does the test container support evaluation of the intended commercial packaging?
8. Initial Results	Are there applicable pre-storage data?
9. Final Results	Are there corresponding post-storage data?
10. Active Ingredient Content	Does the active ingredient content meet the relevant acceptance criteria?
11. Physical Properties	Do the applicable physical parameters meet the requirements?
12. Relevant Impurities	Have relevant impurities been evaluated where applicable?
13. Test Methods	Are the methods and versions clearly specified and applicable?
14. Acceptance Criteria	Are there clear, verifiable quality standards?
15. Study Conclusion	Is the conclusion supported by the study results?
16. Shelf-Life Claim	Is there adequate evidence to support the claimed shelf life?
17. Regulatory Fit	Does it comply with the relevant requirements of the target country?
18. Data Access	Is there authorization to use the data in the relevant registration application?
19. Commercial Consistency	Does the product to be procured maintain appropriate consistency with the study subject?
20. Change Control	How are significant changes to formulation, source, or packaging managed?

For buyers, there is no need to turn every project into a new experiment.

The purpose of this checklist is to help you understand which existing evidence to review and which issues require further clarification from the supplier .

Frequently Asked Questions

What is the primary purpose of Storage Stability Testing?

It is primarily used to evaluate whether a pesticide formulation can maintain chemical and physical quality in accordance with relevant specifications under specified storage conditions.

It can support product development, quality evaluation, registration, and commercial supply decisions.

Are 54°C and 14 days mandatory test conditions for all pesticide registrations?

No.

This is one of the common test conditions for Accelerated Storage Stability testing.

Whether it is applicable, and whether other temperature and time regimens can be used, must be determined based on the product, the method, and the target regulatory requirements.

Does passing accelerated stability testing guarantee a two-year shelf life?

No, this cannot be guaranteed.

Accelerated data can support stability evaluation, but the final shelf life must be determined by considering the product’s properties, test results, packaging, expected storage conditions, and regulatory requirements.

What is the difference between Accelerated and Real-Time Stability?

Accelerated Stability evaluates product changes over a shorter period under specified accelerated conditions.

Real-Time Stability, on the other hand, directly observes changes in the product over time under specified long-term storage conditions.

The evidential value of the two approaches differs.

Does every pesticide formulation require the same stability testing?

No.

Formulations such as SC, EC, SL, WP, and WG have different physical systems and require different quality parameters.

Test items should be selected based on the specific product and relevant specifications.

After changing the packaging, can the original stability report still be used?

It is possible, but this cannot be automatically assumed.

It is necessary to evaluate whether the original data is representative based on the formulation, packaging materials, closure, package size, and local regulatory requirements.

Can a stability report from another supplier be used?

You cannot rely solely on the name of the active ingredient.

Further confirmation is required regarding the dosage form, composition, relevant manufacturing sources, the applicability of the data, and whether you possess the legal right to use the data.

Does every batch of commercial product require a complete stability study to be conducted anew?

This cannot be treated as a uniform global requirement.

Product-level stability studies and commercial batch QC are distinct quality activities.

The specific testing frequency should be determined by relevant regulations, the product quality system, and commercial agreements.

If there is only a Storage Stability Report and no COA, can the product be procured directly?

It is not recommended to treat the two as interchangeable documents.

Stability studies are used to support the quality evaluation of a product under specified storage conditions.

A commercial batch COA, on the other hand, is used to document the test results of the actual batch in question.

Acceptance of a specific order should be based on the agreed-upon specifications and quality requirements.

If a stability report is accepted in one country, will it necessarily be accepted in another?

Not necessarily.

Different countries may have different data requirements, methods, formats, or registration pathways.

You should first confirm the requirements of the target regulatory authority before determining whether the existing study can be used.

If the report shows that a certain parameter has changed after storage, does that mean the product is non-compliant?

Not necessarily.

It depends on whether the change exceeds the applicable acceptance criteria, as well as how the relevant study methods and product specifications are defined.

A change does not automatically mean the product is non-compliant, but issues that exceed the permissible range cannot be ignored.

Before registration and bulk procurement, confirm whether the stability data is truly applicable

For pesticide importers and distributors, Storage Stability Data is not merely a technical document to be filed away.

It should help you answer:

Will the product I intend to register maintain the required quality under the specified storage conditions?

Do the studies provided by the supplier correspond to the exact formulation and packaging?

Can future commercial batches be manufactured and tested according to the same set of clearly defined quality standards?

Therefore, when reviewing stability reports, the most important thing is not simply to look at the final “PASS” or “FAIL” result.

Rather, it is essential to connect the following information:

Product Identity → Study Conditions → Test Methods → Before/After Results → Acceptance Criteria → Registration Requirements → Commercial Supply

POMAIS collaborates with international pesticide importers, distributors, registration companies, and pesticide brand owners to provide support regarding pesticide formulations, product specifications, technical documentation, packaging, and export supply.

If you are evaluating a pesticide registration or bulk purchase project, please provide the following information first:

Project Information	Example
Destination Country	Kazakhstan
Active Ingredient	Imidacloprid
Concentration	200 g/L
Formulation	SL
Registration Status	New Registration
Available Stability Data	Accelerated / Real-Time / To Be Confirmed
Packaging Requirement	250 mL, 1 L
Technical Document Requirements	Target Market Information Checklist
Estimated Order Quantity	Initial Order or Annual Purchase Volume

We can discuss existing technical documentation, product specifications, packaging solutions, and stability issues requiring further confirmation based on specific product and project requirements.

If mass production and export have already begun, we also need to confirm whether the quality inspections and related documentation for the actual commercial batches are complete. For this part, please continue to refer to POMAIS’s Pre-export Quality Control Guidelines for Pesticides.

Contact POMAIS to discuss pesticide registration documentation and bulk procurement needs .

Truly valuable storage stability data does more than simply prove that a single sample passed a test; it helps importers confirm whether there is a reliable technical link between the specific product, the applicable quality requirements, and future commercial supply.