What a certificate of analysis shows ↗
A certificate of analysis records analytical results for an identified sample or lot. It is distinct from a catalogue specification.
01 / The catalogue
What each record publishes.
Every record states its product name, listed strength, listed format, sequence, molecular formula, computed molecular weight, residue count, and molecular class. Molecular weights are computed from the formula where one exists, rather than restated.
02 / Review flow
How to read a record.
01
Read the specification
Check the listed strength, sequence, molecular formula, and computed mass on the record itself.
02
Check the class
Each record states its molecular class and research area, so comparable materials sit together.
03
Compare side by side
Use the compare tool to put two records against each other before choosing.
03 / Glossary
The vocabulary.
- Listed strength
- The amount of material in the vial as listed. It is not a statement of lot testing, purity, fill verification, or availability.
- Molecular formula
- The elemental composition of the molecule. Where a discrete formula exists, we compute the mass from it rather than restating a figure.
- Residue count
- The number of amino acids in a peptide. Records with no unambiguous documented count show a dash rather than a guess.
- Lot documentation
- Lot-specific certificates of analysis are published only when an independent lab result exists for that lot. Until then each record shows its reference specification.
- Research use only
- The site is not a source of personal-use, administration, dosing, diagnostic, treatment, or consumption guidance.