Why lot numbers matter for research peptides
Every vial of research material comes from a specific production batch, called a lot. The lot number is the link between the vial in your hand and the lab report that describes it.
One lot, one certificate
A certificate of analysis describes one lot. Purity, identity, and appearance results apply to that batch only. The next batch is made separately and tested separately, so a COA is only meaningful when its lot number matches the vial.
Batch-to-batch variation
Even when two lots both meet a ≥99% purity spec, their minor impurities can differ. If an experiment gives an unexpected result, knowing which lot was used is the first thing you will want to check.
What to record
- Compound name, vial size, and lot number.
- Date received and storage conditions.
- Reconstitution date, solvent, and volume.
- Which experiments used which lot.
Ask for the COA that matches
If you need the certificate for a lot you received, email business@saevin.com with your order number and the lot number on the vial.