A retatrutide Certificate of Analysis documents the batch’s identity, purity, and the methods used to measure them — reading it confirms you have the right molecule at a known purity. This guide walks through each field for retatrutide (RT-GLP3).
Identity fields
Product name, sequence, molecular formula, and CAS number (where applicable) identify the compound. The measured molecular weight should match the theoretical value for retatrutide.
Purity and method
Purity is reported as a percentage and should name the method (typically HPLC) and conditions. A purity figure without a method is weaker evidence.
Mass spectrometry result
The COA lists the observed mass next to the expected mass. A close match confirms the material is retatrutide.
Batch-specific vs generic
The strongest COA is tied to the lot you received, with dated test data — not a generic specification sheet. Source retatrutide (RT-GLP3) with a batch COA. For the same checks applied to material sold under the "GLP-3 RT" label, see Sourcing GLP-3 RT as a Research Material.
Find a COA: every RT-GLP3 batch report is listed in our certificate of analysis library, searchable by batch number.
Related research guides
- How to verify retatrutide purity (HPLC, MS, COA)
- What you can't tell by eye
- Why at-home kits can't measure purity
- Retatrutide identity confirmation by mass
- GLP-3 RT (RT-GLP3) explained
Research-use note
All materials discussed are supplied for in vitro laboratory research use only, and are not for human or animal use.
