Vial · 5 mg
Quality documentation
Certificate of analysis
Every lot is tested before it ships and the certificate is published in full, unsummarised. The first lots are in testing now, so every result below reads pending.
Lab analysis · independent ISO/IEC 17025 laboratory
Pending
HPLC purity · first lot in testing
- Purity (HPLC) — pending
- Identity (LC-MS) — pending
- Net peptide (UV) — pending
- Water (KF) — pending
- Counter-ion (IC) — pending
- Endotoxin (LAL) — pending
About GR-S1
GR-S1 is a synthetic 31-amino-acid analogue of human glucagon-like peptide-1, carrying a C18 fatty-diacid side chain on the lysine at position 20. It is supplied as a lyophilized powder and is held in laboratories as the benchmark GLP-1 receptor reference compound.
Every vial is filled and lyophilized under GMP at the source and leaves with a batch number on the label. Purity, identity, net peptide, water, counter-ion and endotoxin are run by an independent ISO/IEC 17025-accredited laboratory in the United States, and the certificate for that lot is published in full.



