Quality
One batch, one certificate.
Every vial carries a batch number. That number refers to a certificate of analysis, handed to the customer with the order, which prevails as to the identity and purity of the product received.
Certificate of analysis
What it contains.
- Batch. Number and date of analysis.
- Identity. Mass measured by mass spectrometry.
- Purity. Percentage measured by HPLC, chromatogram attached.
- Quantity. Mass of product per vial.
Product sheet
What it states.
- Identifiers. CAS number, molecular formula, molar mass.
- Sequence. For peptides, with modifications.
- Sizes. Quantity per vial and reference.
- Storage. Temperature and precautions.
Identifiers
How they are checked.
- Sources. PubChem, the FDA substance registry and UniProt.
- Cross-check. Formula and molar mass recomputed from the sequence.
- Unclear identity. No identifier is published.
- Discrepancy. The batch certificate prevails.
A question about a batch?
Give the reference and the batch number: we send you the matching certificate.