HPLC and purity
High-performance liquid chromatography is often the first document people look for, but a single purity percentage should not be treated as the whole quality story. A batch record is stronger when the chromatogram, method reference, test date, lot number, and result interpretation are all present together.
Check method context. A purity number means more when it is attached to a method or report reference instead of standing alone on a marketing graphic.
Check lot alignment. The lot number on the chromatogram should match the lot number on the COA and shipping documentation.
Check release timing. A very old result may not tell you much about a recently dispatched batch unless the supplier can show continuity of records.
Identity confirmation
Identity checks, often through LC-MS or comparable mass confirmation, help verify that the tested material matches the expected compound rather than just a clean impurity profile. Purity without identity can still leave gaps.
Working rule Ask whether the batch packet includes both a purity-oriented record and an identity-oriented record. Treat those as complementary, not interchangeable.
Sterility and endotoxin
Where a supplier provides sterility or endotoxin data, teams should note the date, report linkage, and whether the result is tied to the same lot number as the purity documentation. Missing linkage creates uncertainty even when the result itself looks clean.
These documents still need to be understood as part of a wider batch file rather than as standalone proof of suitability for any therapeutic or consumptive use.
Release documentation
A strong batch file usually combines test results with practical release records: lot number, dispatch or release date, analyst or laboratory reference, storage note, and any handling caveats that affect storage after receipt.
Keep the review simple If a batch document cannot be tied back to a lot number, test date, and release note, file it as incomplete until clarified.
