COA and lab testing
Every batch is tested by an independent laboratory for purity and identity before release. Results for all current batches are below.
What we test
Purity by HPLC
Reverse-phase high-performance liquid chromatography with UV detection at 220 nm. Purity is the main peak as a share of total peak area. Release spec is 99.0% or higher.
Identity by mass spectrometry
ESI-MS confirms the observed molecular mass matches the theoretical value for the sequence, within ±1 Da.
Appearance and sealing
Each lot is checked visually for a uniform lyophilised cake, correct fill and an intact crimp seal before labelling.
Reading a chromatogram
The tall peak is the target compound. Small peaks are related impurities. The purity figure on each COA is the target peak’s area divided by the total area of all peaks. This example is batch CL-2609-IPA1.
Current batch results
The batch you receive is printed on the vial label and matches a row in this table.
| Product | Batch | Test date | HPLC purity | Identity (MS) | Status |
|---|
Need a full COA before you order? Email support@crestovalabs.com with the batch number and we’ll send the PDF.