Sports Technology Labs supplies this product as MK-777 (Acetamoren), a liquid research material labeled at 20 mg/mL in a 30 mL bottle (600 mg nominal total). Review the specifications and published analytical report before selecting material for your laboratory protocol.
The published MZ Biolabs certificate identifies lot 2026-01-26, analyzed February 10, 2026, with a reported 99.12% HPLC purity using HPLC-UV-MS. This is a result for the tested sample, not a guarantee that every lot has the same result or a measurement of the finished liquid’s concentration. Confirm the supplied lot and its corresponding documentation before ordering.
Review the MK-777 batch COA Compare the product specifications
Laboratory research only. Not for human or animal consumption or administration.
| Compound Class | Research material supplied as MK-777 (Acetamoren) |
|---|---|
| Concentration | 20 mg/mL |
| Composition | Listed formulation: PEG-400 and ethanol base with MK-777; see the batch report for the tested sample |
| CAS Number | 950841-87-9 |
| Chemical Formula (CAS reference) | C29H38N4O6S |
| Molar Mass (CAS reference) | 570.70 g/mol |
| Synonyms | MK-777, Acetamoren, MK777 |
| Volume | 30 mL per bottle (600 mg total) |
| Verified Purity | Published COA: 99.12% (HPLC), lot 2026-01-26, analyzed February 10, 2026 |
CAS 950841-87-9 is printed on the published COA. PubChem lists this CAS under N-Acetyl Ibutamorelin, with formula C29H38N4O6S and molecular weight 570.7 g/mol. These reference identifiers are not a substitute for lot-specific analytical verification. For laboratory research use only; not for human or animal consumption.
View certificates of analysisThis compound is analyzed by an accredited US third-party laboratory before it ships.
Purity and identity confirmed by MZ Biolabs (Tucson, AZ), a US DEA-licensed analytical facility, via HPLC purity analysis and mass-spectrometry identity confirmation under GLP standards.
Our third-party certificates of analysis are published on our website — no login required.
This bottle is built to preserve compound integrity throughout your research timeline.
Quality control across the research-compound industry is inconsistent, which makes third-party verification essential. A 2017 analysis published in JAMA examined 44 products marketed online as research androgen-receptor compounds and reported wide gaps between labels and contents.
Source: Van Wagoner et al., JAMA, 2017 (ref. 3).
Verified by MZ Biolabs (Tucson, AZ), an accredited US laboratory, via HPLC and mass spectrometry.
Suspended in a dual-solvent carrier system selected for this compound and bottled in America.
Prevents BPA leaching and avoids contamination from external tools.
Transparent business, standard payment methods, no misrepresentation.
MK-777 and Acetamoren are the names used for this STL research product and on its published laboratory report. The report lists CAS 950841-87-9. Chemical identifiers and sample purity help with material selection, but do not establish biological activity, selectivity or equivalence to another compound.
This listing describes the supplied research material and its documentation. It does not establish that MK-777 is more potent, safer or more effective than MK-677. Results from MK-677 studies should not be presented as results for MK-777.
MK-777 is an experimental research chemical, supplied strictly for laboratory research. Sports Technology Labs makes no claims regarding its effects, and nothing in this listing should be interpreted as describing outcomes in humans or animals.
MK-777 (Acetamoren) and MK-677 (Ibutamoren) are separate product identifiers in the STL catalog. Similar naming does not demonstrate equivalent composition or biological activity. The original MK-0677 / L-163,191 study concerns MK-677, not this MK-777 product. For a material comparison, review each product’s identity, labeled concentration, solvent system and lot-specific COA rather than transferring study findings between them.
Compare the MK-677 (Ibutamoren) product specifications with the MK-777 specifications above. Choose research materials against your laboratory’s documented requirements, not an assumed interchangeable name.
Yes. This listing and its published COA use MK-777 (Acetamoren); MK777 and MK 777 are spelling variants used to search for this product. Check the lot number and analytical identifiers in addition to the name.
No. STL lists MK-777 as Acetamoren and MK-677 as Ibutamoren. Do not treat these product names as interchangeable or assume that evidence for MK-677 demonstrates the properties of MK-777.
The liquid is labeled at 20 mg/mL in a 30 mL bottle, equivalent to a nominal 600 mg total. This label calculation is separate from HPLC sample purity; the published purity percentage does not verify finished-solution concentration.
Open the published MK-777 certificate of analysis. It identifies lot 2026-01-26, analysis date February 10, 2026, and 99.12% purity by HPLC-UV-MS. Match the supplied lot to the applicable report; contact STL if you need documentation for another batch.
Check the compound identifier, lot number, test date, analytical method and reported result. A purity result does not establish suitability for human use or guarantee identical results for other lots. Use the guide to reading a certificate of analysis when reviewing the report.
Select for laboratory research: Compare the MK-777 specifications, review the published batch COA, and confirm the supplied lot before placing a research-material order. Not for human or animal use.
MK-777 is an investigational compound. It is not approved by the FDA and is not a dietary supplement, drug, or food. Marketing it for human ingestion is unlawful.
As a growth hormone secretagogue and ghrelin receptor agonist, MK-777 falls under the World Anti-Doping Agency’s S2 category (Peptide Hormones, Growth Factors, Related Substances and Mimetics), prohibited in- and out-of-competition (ref. 4).
In the United States, MK-777 is not a controlled substance and may be legally purchased and possessed for laboratory research use.
Sports Technology Labs are chemical suppliers, not medical providers. We do not condone or encourage consumer use of research compounds.
Research use only. All products on this website are intended exclusively for laboratory research and development. They are not for human or animal consumption. These statements have not been evaluated by the U.S. Food and Drug Administration, and these products are not intended to diagnose, treat, cure, or prevent any disease.
| Weight | 3.0 oz |
|---|---|
| Dimensions | 3 × 2 × 1 in |
