How it works
An independent laboratory receives the material and runs the analyses — identity by mass spectrometry, purity by HPLC — reporting the results under its own name. That the testing party is separate from the manufacturer is what “third-party” denotes.
The certificate names the laboratory that performed the testing, so the result can be attributed. A named lab is accountable for its figures in a way an unattributed number is not.
Third-party testing verifies; it does not manufacture. It is a check on what was made, run after the fact, and its value is in the separation between making and measuring.
Why it matters
Independence addresses the obvious conflict of interest in self-reported quality. A manufacturer grading its own material has an incentive the independent lab does not, which is why the testing party is disclosed.
Attribution makes a figure auditable: a named laboratory and a dated certificate can be checked, questioned, and compared, where an anonymous percentage cannot.
It complements, rather than replaces, the rest of the record. Third-party testing is where the identity and purity numbers come from; the lot number, dates, and methods are the context that makes them interpretable.
At Lineará
Every certificate names the independent laboratory that performed the testing — for example, Janoshik Analytical — alongside the tested date and the methods used.
The lab record aggregates that testing across the catalog, so the independent measurements can be read together rather than one certificate at a time.