A product name is not enough
Two containers may carry the same product name and still come from different production batches. Raw materials, process conditions, purification, handling, and test dates can differ. The lot identifier is the practical link between a physical item and the record created for its sample.
That is why a document should be matched by lot or batch—not selected merely because the compound name and nominal size look familiar.
Traceability preserves context
A useful laboratory record preserves enough context to understand what was tested, when it was tested, which procedure was used, and what result was reported. FDA guidance for reference standards emphasizes documenting identity, purity, and stability and storing standards under defined conditions.
NIST's work assigning values to protein and peptide reference materials likewise illustrates why documented methods, accuracy, and precision matter when results will support later measurements.
A simple lot-matching workflow
Before attaching a COA to a project record, compare the label and document directly. Preserve the original file rather than a cropped screenshot so the method, dates, identifiers, and laboratory information remain available.
- Record the exact product and stated form
- Copy the lot or batch identifier exactly
- Match that identifier to the report
- Confirm the reported method and dates
- Retain the document with the experiment record
What to do when the lot is not listed
Do not substitute the nearest-looking document. Request the matching record from the supplier and keep the material clearly identified while the discrepancy is resolved.
The Bluegrass COA directory organizes available reports by product, but researchers should still match the lot shown on their material. If the correct file is not displayed, contact support with the product name and lot identifier.