MK-677
Non-peptide research compound supplied by Loti Labs as a research liquid and capsules for laboratory research. Specifications, the current certificate of analysis and the full batch history, all on one page.
MK-677 25mg/ml (30ml). For laboratory, analytical and research use only.Compound specifications
| Compound | Ibutamoren (MK-677) |
| Class | Non-peptide research compound |
| Molecular formula | C27H36N4O5S |
| Molecular weight | 528.7 g/mol |
| CAS number | 159634-47-6 |
| Form | Research liquid, 30 mL bottle · Capsules, 30 count |
| Formats | 25 mg/mL liquid, 30 mL · 10 mg per capsule, 30 capsules |
Latest certificates of analysis
25 mg/mL liquid, 30 mL
10 mg per capsule, 30 capsules
Batch history
| Test date | Format | Batch | Purity | Identity | Laboratory | |
|---|---|---|---|---|---|---|
| Mar 21, 2026 | 25 mg/mL liquid, 30 mL | LLMK67326 | 99.91% | Conforms | SR Bio Labs | Certificate |
| Mar 21, 2026 | 10 mg per capsule, 30 capsules | LOT-MK67-00006 | 99.91% | Conforms | SR Bio Labs | Certificate |
| Dec 29, 2025 | 10 mg per capsule, 30 capsules | LOT-MK67-00005 | 99.89% | SR Bio Labs | Certificate |
How every batch is tested
Every Loti Labs batch is tested by an independent, U.S.-based third-party laboratory. Purity is measured by HPLC and identity is confirmed by mass spectrometry. Where a certificate includes an endotoxin screen, the result is shown above. Each certificate is archived permanently under its batch number, so earlier batches stay on record after a new one arrives. Search the complete COA archive.
Questions researchers ask
What purity is the current MK-677 batch?
25 mg/mL liquid, 30 mL: batch LLMK67326 tested at 99.91% purity by HPLC on Mar 21, 2026, identity confirmed by mass spectrometry. 10 mg per capsule, 30 capsules: batch LOT-MK67-00006 tested at 99.91% purity by HPLC on Mar 21, 2026, identity confirmed by mass spectrometry.
What is the molecular formula and weight of MK-677?
MK-677 has molecular formula C27H36N4O5S and a molecular weight of 528.7 g/mol, CAS 159634-47-6.
How do I find the certificate for my bottle?
Match the lot number printed on the bottle label to the batch column in the history table, or search it in the Loti Labs COA archive. Every certificate is kept permanently under its batch number.
What is MK-677 from Loti Labs intended for?
Loti Labs supplies MK-677 strictly for laboratory, analytical and research use. It is not for human or veterinary use, and it is not a drug, food or cosmetic.
Available to registered researchers
Ordering opens after you sign in or create a free research account.
RESEARCH USE ONLY. This page is provided for laboratory, analytical and research reference. Products are not drugs, foods or cosmetics and are not for human or veterinary use.