Certificate of analysis and batch information

Finding your batch's CoA

Every shipment includes the batch number on the vial label and on the packing slip. To download the CoA:

1. Sign into your account.
2. Navigate to Orders.
3. Click your order; the CoA link appears next to each line item that has a downloadable certificate.

If you don't have an account, the order confirmation email also contains direct CoA links.

What each section means

• Identity: mass-spec confirmation that the peptide matches the claimed sequence.
• Purity: HPLC peak integration, typically at 220nm.
• Appearance: visual inspection (white lyophilized solid is the norm).
• Lot/batch number: unique identifier matching what's on your vial.
• Manufactured date: when synthesis was completed.
• Storage recommendation: typically -20°C, lyophilized.

Public CoA browser

You can also browse public CoAs by visiting our CoA index page. This includes batches we've shipped recently; older batches are archived but available on request.