Purity + Assay
Common GLP-1 peptide blind test
99.741% HPLC · 20.92 mg assay
Task
112563 · Verify key YCYA75M373NAOur most-documented batch. Janoshik ran a full panel from 21 to 24 April 2026: 99.741% HPLC, 20.92 mg retatrutide assay, heavy metals (As, Cd, Pb, Hg) not detected, TFA not detected, and bacterial endotoxin 1.449 EU/Vial via LAL. Endotoxin is a release test pharma runs on injectables; it is distinct from sterility testing, not a substitute for it. Most research peptide sellers skip it. We publish it.
Batch Facts
- Product
- Retatrutide 10mg vial
- Batch number
- RET-20-V-2604-001
- Molecule
- Retatrutide (LY-3437943), CAS 2381089-83-2
- Purity (HPLC)
- 99.741%
- Assay
- 20.92 mg retatrutide
- Heavy metals (As, Cd, Pb, Hg)
- Not detected
- Residual TFA
- Not detected
- Bacterial endotoxin (LAL)
- 1.449 EU/Vial
- Laboratory
- Janoshik Analytical
- Sample received
- 15 April 2026
- Analysis dates
- 21–24 April 2026
- Purity verify key
YCYA75M373NA- Heavy metals verify key
GHHWTCPUSEZ7- TFA verify key
NUA8B6XPAMWZ- Endotoxin verify key
E8ZFE17MI47D
Janoshik Reports
Heavy metals
As, Cd, Pb, Hg analysis
All four not detected
Task
112569 · Verify key GHHWTCPUSEZ7
Residual solvent
TFA analysis
Not detected
Task
112564 · Verify key NUA8B6XPAMWZ
Contaminant panel
Bacterial endotoxin (LAL)
1.449 EU/Vial
Task
112565 · Verify key E8ZFE17MI47DWhat These Tests Prove
The vial-line batch ships with the most complete published panel: 99.741% HPLC purity, 20.92 mg assay, no heavy metals detected, no TFA detected, and 1.449 EU/Vial bacterial endotoxin via LAL. Each result has its own Janoshik verification key (Purity YCYA75M373NA, Heavy metals GHHWTCPUSEZ7, TFA NUA8B6XPAMWZ, Endotoxin E8ZFE17MI47D) so any single number can be audited against the original report.
What these tests do not prove: LAL detects bacterial endotoxin contamination but is not a sterility certification. The reports cover the tested lot at the test date and do not warrant shelf life beyond the date stamp or correct handling after dispatch.
Common Questions
What is batch RET-20-V-2604-001?
Retatrutide 10mg vial. Janoshik ran a full panel 21–24 April 2026: 99.741% HPLC, 20.92 mg retatrutide assay, heavy metals (As, Cd, Pb, Hg) not detected, TFA not detected, bacterial endotoxin 1.449 EU/Vial.
What does 1.449 EU/Vial mean?
EU is endotoxin units, measured via the LAL (Limulus Amebocyte Lysate) assay. 1.449 EU/Vial is the bacterial endotoxin load found in the vial. Endotoxin is a release test pharma runs on injectables; it is distinct from sterility testing, not a substitute for it. Most research peptide sellers skip it; this batch publishes the number.
Why test for TFA?
TFA (trifluoroacetic acid) is a common residual solvent from peptide synthesis. HPLC purity does not see it. Testing separately confirms it is not present. For this batch, TFA was not detected.
How do I verify each Janoshik report?
Go to janoshik.com and paste the relevant verification key. Purity:
YCYA75M373NA. Heavy metals: GHHWTCPUSEZ7. TFA: NUA8B6XPAMWZ. Endotoxin: E8ZFE17MI47D. Each returns the original report off Janoshik's server.
What product ships with batch RET-20-V-2604-001?
The Retatrutide 10mg vial ships under this batch, and the 40mg pen carries the same batch-matched COA. The 40mg vial now ships under its own batch RT-40-V-001.