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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 AnalyticalCertificate of Analysis ยท Lot release ยท tested in-housePrymaLab Analytical ยท Attn: Sample intake ยท 3705 Music Branch Rd ยท Ashland, KY 41102 ยท United States
Certificate number PL-26-00085 Key 4FNUZA3N Verify at prymalab.net/testing/verify/

Retatrutide 40 mg Lot PL-2609-085 ยท analysed September 19, 2026 ยท issued October 3, 2026

Purity ยท RP-HPLC99.44%Specification 99.0% โ€ข main peak at 8.77 min
Identity ยท Observed Mass4731.3 DaTheoretical 4731.4 Da โ€ข โˆ’0.1 Da (โˆ’21 ppm)
ConclusionPASSMeets every specification for the tests performed

The certificate

Certificate of analysis PL-26-00085, page 1
Page 1: results, specifications and chromatogram
Certificate of analysis PL-26-00085, page 2
Page 2: HPLC method, peak table, mass spectrometry and approval

Summary

CompoundRetatrutide
LY3437943; GIP/GLP-1/glucagon receptor triple agonist
CAS number2381089-83-2
Molecular formulaC221H342N46O68
Theoretical mass4731.4 Da
Sequence / structureH-Y-Aib-QGTFTSDYSI-[ฮฑMeLeu]-LDKK(AEEA-ฮณGlu-C20 diacid)AQ-Aib-AFIEYLLEGGPSSGAPPPS-NHโ‚‚ (39 residues; Aib2, ฮฑ-methyl-Leu13, Aib20; Lys17 acylated with eicosanedioic acid via ฮณ-Glu and AEEA; C-terminal amide)
AppearanceWhite lyophilized powder
Storageโˆ’20 ยฐC, desiccated, dark
Label claim40 mg/vial
Lot numberPL-2609-085
Certificate numberPL-26-00085
Date of analysis2026-09-19 (retest 2028-09-18)
Purity (RP-HPLC)99.44%
Identity (LC-MS)4731.3 Da
Water content (KF)1.6%
Endotoxin (LAL)0.04 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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