Quality control & batch documentation
Purity claims are cheap. What matters is whether the claim on the label can be traced to a specific lot, a specific method and a specific result. This page describes the testing and release framework behind every batch we ship.
The release chain
| Stage | What is checked | Record |
|---|---|---|
| Incoming material | Identity, appearance, supplier documentation | Receiving record |
| Synthesis & purification | Process parameters, purification fractions | Batch production record |
| Lyophilization | Cycle parameters, residual moisture | Lyophilization log |
| Analytical release | HPLC purity, MS identity, appearance, water content | COA + chromatogram + MS spectrum |
| Packaging & labeling | Fill weight, label content, batch/expiry | Packaging record |
Analytical methods
HPLC purity
Reverse-phase HPLC with UV detection at the compound-appropriate wavelength. Purity is reported as area percentage of the main peak; the chromatogram is included with the COA so buyers can see the integration, not just a number.
Mass-spectrometry identity
ESI-MS or MALDI-TOF confirmation of the expected molecular ion. This is the check that distinguishes "the right peak" from "the right molecule".
Water content
Karl Fischer titration where applicable. Residual moisture affects stability and weighing accuracy, and is reported rather than assumed.
Appearance & solubility
Visual inspection of the lyophilized cake and a solubility check in the recommended laboratory solvent.
What a COA from us contains
- Product name, strength, batch number, manufacture and expiry dates
- Test items, methods, specifications and results
- HPLC chromatogram with integration data
- MS spectrum and interpretation
- Storage and handling statement
- Release signature and date
What we do not claim
See a sample COA structure · Testing methods in detail