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-26-00242
Key
W475JVK9
Verify at prymalab.net/testing/verify/
MK-677 10 mg Capsules (60 ct) Lot PL-2610-128 · analysed October 6, 2026 · issued October 13, 2026
Purity · RP-HPLC99.89%Specification ≥ 99.0% • main peak at 12.86 min
Identity · Observed Mass528.67 DaTheoretical 528.66 Da • +0.01 Da (19 ppm)
ConclusionPASSMeets every specification for the tests performed
The certificate
Summary
| Compound | MK-677 Ibutamoren (MK-677), ghrelin receptor agonist (mesylate as commonly supplied) |
|---|---|
| CAS number | 159752-10-0 |
| Molecular formula | free base C27H36N4O5S |
| Theoretical mass | 528.66 Da |
| Storage | — |
| Label claim | 10 mg per capsule |
| Lot number | PL-2610-128 |
| Certificate number | PL-26-00242 |
| Date of analysis | 2026-10-06 (retest 2028-10-05) |
| Purity (RP-HPLC) | 99.89% |
| Identity (LC-MS) | 528.67 Da |
| Endotoxin (LAL) | — |
| Conclusion | PASS |
| Tested by | PrymaLab 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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