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Published lot certificate Issued by PrymaLab Analytical for a PrymaLab production lot. Scan the QR code or enter the number and key on the verify page to confirm any printed copy.
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PrymaLab
PrymaLab AnalyticalCertificate of Analysis · Lot release · tested in-housePrymaLab Analytical · Attn: Sample intake · 3705 Music Branch Rd · Ashland, KY 41102 · United States
Certificate number PL-26-00104 Key CCNFZPXH Verify at prymalab.net/testing/verify/

Testagen 20 mg Lot PL-2609-104 · analysed September 19, 2026 · issued October 3, 2026

Purity · RP-HPLC99.53%Specification 99.0% • main peak at 4.42 min
Identity · Observed Mass447.6 DaTheoretical 447.4 Da • +0.2 Da (447 ppm)
ConclusionPASSMeets every specification for the tests performed

The certificate

Certificate of analysis PL-26-00104, page 1
Page 1: results, specifications and chromatogram
Certificate of analysis PL-26-00104, page 2
Page 2: HPLC method, peak table, mass spectrometry and approval

Summary

CompoundTestagen
Lys-Glu-Asp-Gly (KEDG); Khavinson testicular peptide bioregulator
CAS numberNot assigned
Molecular formulaC17H29N5O9
Theoretical mass447.4 Da
Sequence / structureH-KEDG-OH (4 residues; free N- and C-termini)
AppearanceWhite lyophilized powder
Storage−20 °C, desiccated, dark
Label claim20 mg/vial
Lot numberPL-2609-104
Certificate numberPL-26-00104
Date of analysis2026-09-19 (retest 2028-10-01)
Purity (RP-HPLC)99.53%
Identity (LC-MS)447.6 Da
Water content (KF)2.1%
Endotoxin (LAL)0.05 EU/mg
SterilityNo growth; conforms
ConclusionPASS
Tested byPrymaLab Analytical (PrymaLab's own laboratory, Ashland, KY). In-house result, not an independent third-party test.
Third-party testing guarantee. Have this product tested by any independent laboratory. If the result does not come back as the compound named on the label, at the purity and amount stated, we refund your order in full and reimburse the cost of the test. Email the lab report and your order number to michael@prymalab.net.

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