Two vials can carry the same product name, but their analytical data can differ. Without a batch identifier, it can be harder to determine whether material differences may have contributed to an unexpected result. We built our lot documentation to help reduce that traceability gap.
Each documented vial is linked to its assigned lot, applicable Certificate of Analysis (CoA), and available analytical records. This connection helps laboratories trace questions back to the relevant lot records more efficiently.
Request a sample CoA to see our lot documentation.
What a Batch Identifier Tells a Laboratory
A batch is a defined quantity of material produced under a specified manufacturing process. A lot identifier links the supplied material to its corresponding records.
The Core Elements of a Lot Record
A useful lot record connects the vial label to the analytical and product information available for that lot. Depending on the material and documentation, records may include the lot number, manufacturing date, sequence, CAS number where one exists, and analytical data associated with that lot.
Lot-specific documentation helps distinguish the material being evaluated from records associated with other lots.
Why One Product Name Is Not Enough
Analytical characteristics can vary between peptide lots, including purity, peptide content, counterion content, and impurity profile.
The product name identifies the intended material, while the lot number links the supplied material to its batch-specific records.
How Lot-Level Traceability Supports Experimental Data
Lot-level traceability supports reproducibility by documenting which material was used. Recording the lot number lets researchers connect experimental observations to the material used in a specific study.
Comparing Data Across Studies
When a group repeats an experiment months later, the material may come from a new lot. With both lot numbers on file, the team can compare the available CoAs before interpreting differences in the experimental results.
If reported characteristics differ, the team can consider those differences when interpreting the results.
Investigating Unexpected Observations
Sometimes an assay behaves differently than it did before. Lot records let a quality control manager evaluate whether documented material characteristics may warrant further investigation by reviewing the available identity, purity, storage, and lot-specific records.
If the available material records do not identify an obvious discrepancy, the team can investigate other variables such as reagents, cell passage, or instrument performance.
Lot Documentation May Include
We treat lot records as part of our product documentation, not paperwork added afterward. Depending on the material and available records, lot documentation may include:
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Lot number printed on the vial label and associated with the CoA.
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Sequence, molecular formula, and theoretical molecular weight
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HPLC purity with the chromatogram
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Mass spectrometry data reporting observed molecular-mass information.
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Storage conditions for the lyophilized material
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Manufacturing and testing dates
We retain lot records according to our documentation practices and make records accessible for review.
Ask our team which lot documents we can send for your review.
How to Verify a Batch on Receipt
A short receiving check can help identify labeling and documentation issues before materials reach the bench. We recommend the following sequence for incoming research materials.
Match the Label to the CoA
Confirm that the lot number on the vial matches the lot number on the CoA. Also confirm the product name, sequence, and quantity. A mismatch at this stage should prompt the laboratory to hold the material and contact us for clarification.
Log the Lot in Your Inventory System
Record the lot number, receipt date, and storage location. Carry the lot number into notebook entries or other experimental records that use the material.
This simple practice can make later review or audit tracing easier.
Compare Observed and Theoretical Mass
Check that the observed molecular-mass information on the CoA matches the theoretical value for the stated sequence, where reported.
Agreement between observed and theoretical molecular mass can support an identity assessment within the limits of the method. Laboratories that perform confirmatory mass spectrometry in-house can compare their own analytical results with the available supplier documentation.
Our Approach to Lot Control
We assign lot numbers at the point of manufacture and maintain lot-specific records according to our documentation practices. Our goal is to make it easier for scientists to connect experimental records to the material used.
Browse our catalog and request the CoA for any applicable lot.
Our products are intended for laboratory research use only. They are not intended for human or veterinary use.