Research hub
- How to read a certificate of analysis — What each line on a certificate means, from lot number to chromatogram.
- Storage and handling of lyophilized material — Temperature, light and moisture: keeping research material stable on the shelf.
- HPLC and mass spectrometry, explained — The two methods behind every SCALE Performance certificate, in plain terms.
- Peptide sequences and notation — Three-letter codes, terminal modifications and what an acetate salt means.
- Lot numbers and traceability — How one number connects your vial, its certificate and your order.
Glossary
- CAS number
- A unique identifier assigned by the Chemical Abstracts Service to a chemical substance.
- Certificate of analysis (COA)
- A document reporting the test results for one lot.
- LC-MS
- Liquid chromatography with mass spectrometry; confirms molecular mass and identity.
- HPLC
- High-performance liquid chromatography; separates a sample to measure purity.
- Lot
- A batch of material made and tested together, identified by a lot number.
- Lyophilized
- Freeze-dried to remove water for stability.
- Molecular weight (MW)
- The mass of one mole of the compound, in grams per mole.
- Purity
- The share of UV-detectable material that is the target compound, by HPLC peak area.
- RUO
- Research use only; not for human or veterinary use.
- SDS
- Safety data sheet; hazard, handling and storage information for a substance.