MK-677 20mg — Vial Spec, Reconstitution Math & COA
MK-677 (Ibutamoren) in a 20mg laboratory specification provides research facilities with a defined mass for non-clinical ghrelin receptor assays and growth hormone secretagogue evaluations. This document outlines volumetric reconstitution calculations, analytical verification via high-performance liquid chromatography, stability parameters, and batch-level quality control protocols. All data presented strictly concern in vitro and animal models.
Quick answer
MK-677 (Ibutamoren) in a 20mg laboratory specification provides research facilities with a defined mass for non-clinical ghrelin receptor assays and growth hormone secretagogue evaluations. This document outlines volumetric reconstitution calculations, analytical verification via high-performance liquid chromatography, stability parameters, and batch-level quality control protocols. All data presented strictly concern in vitro and animal models.
Key takeaways
- A 20mg vial of MK-677 (Ibutamoren mesylate) contains twenty milligrams of highly purified, non-peptide spiroindoline synthetic compound formulated for laboratory research use only.
- PX1 Research maintains rigorous analytical standards across all catalog offerings, ensuring high-purity raw materials validated by independent testing labs.
- MK-677 functions as a potent, non-peptide agonist of the growth hormone secretagogue receptor (GHSR-1a), commonly referred to as the ghrelin receptor.
- Achieving precise stock concentrations from a 20mg solid mass requires accurate diluent addition and temperature-controlled solvent integration.
Overview and 20mg Vial Specification
A 20mg vial of MK-677 (Ibutamoren mesylate) contains twenty milligrams of highly purified, non-peptide spiroindoline synthetic compound formulated for laboratory research use only. In preclinical assay environments, this specific mass target is routinely requested by structural biology teams and high-throughput screening labs that require precise volumetric working concentrations without mixing excessive stock volumes that risk long-term hydrolytic or photolytic degradation.
Investigators select the 20mg unit specification to streamline batch preparation for mid-scale bench trials. By standardizing liquid handling protocols around a 20mg dry mass substrate, research personnel can compute exact molar concentrations across cell culture assays, enzyme-linked immunosorbent assays (ELISA), and rodent endocrine axis models while maintaining strict control over solvent parameters and aliquot handling.
PX1 Catalog Availability and Format Context
PX1 Research maintains rigorous analytical standards across all catalog offerings, ensuring high-purity raw materials validated by independent testing labs. While research demand frequently requests customized lyophilized or powdered vial sizes such as the 20mg unit, investigators should review our live inventory matrix across all peptides and raw reference materials to confirm real-time batch distribution and current volumetric packaging formats.
For protocols requiring alternate solid-dose handling or standardized oral-equivalent analytical reference standards, PX1 also offers verified formats such as MK-677 Capsules 12.5mg. Whether utilizing raw powders, specialized vials, or solid reference units, every lot distributed by PX1 undergoes identical analytical screening to verify chemical identity, heavy metal limits, residual solvent levels, and mass purity before release.
Mechanism of Action: Ghrelin Receptor (GHSR) Activation
MK-677 functions as a potent, non-peptide agonist of the growth hormone secretagogue receptor (GHSR-1a), commonly referred to as the ghrelin receptor. Preclinical literature confirms that binding to GHSR-1a mimics the signal transduction pathway triggered by endogenous ghrelin, stimulating the anterior pituitary gland to release growth hormone (GH) in a pulsatile manner without disrupting basal cortisol or thyroid-stimulating hormone rhythms.
In vitro data indicate that MK-677 binding initiates intracellular signaling cascades driven by phospholipase C and inositol triphosphate, promoting downstream secretion of GH into extracellular media. Animal models demonstrate that sustained exposure leads to secondary elevations in insulin-like growth factor 1 (IGF-1) circulating concentrations. Because MK-677 operates through receptor-mediated feedback loops, preclinical research consistently focuses on its potential to evaluate muscle tissue preservation, nitrogen balance modulation, and somatotropic axis regulation in non-human experimental subjects.
Laboratory Reconstitution Math (1mL, 2mL, and 3mL Diluent Volume)
Achieving precise stock concentrations from a 20mg solid mass requires accurate diluent addition and temperature-controlled solvent integration. Researchers can utilize the PX1 online reconstitution calculator to verify complex concentration matrices, or apply standard volumetric equations (Concentration = Mass / Volume) for standard laboratory bench calculations.
When adding 1.0 mL of verified laboratory diluent (such as bacteriostatic water or compatible organic co-solvent solutions based on assay solubility requirements) to a 20mg vial, the final stock concentration equals exactly 20.0 mg/mL (20.0 µg/µL). If 2.0 mL of diluent is introduced, the resulting working concentration reduces to 10.0 mg/mL (10.0 µg/µL). Adding 3.0 mL yields a stock concentration of 6.67 mg/mL (6.67 µg/µL). Precise micromolar calculations should always account for the exact molecular weight of MK-677 mesylate (624.77 g/mol) when setting up cell culture media concentrations.
Aliquot Planning and Volumetric Accuracy
To minimize repeat freeze-thaw cycles and prevent atmospheric moisture absorption into open stock containers, research protocols should implement structured aliquot planning immediately following initial reconstitution. Lyophilized powders or raw compounds dissolved in solution exhibit higher rate kinetics for oxidative breakdown when repeatedly exposed to ambient temperatures and headspace gas exchanges.
For high-precision micro-dispensing, working stocks should be pipetted into sterile, polypropylene micro-centrifuge tubes at predetermined single-use volumes (e.g., 50 µL to 200 µL). Utilizing calibrated positive-displacement micropipettes ensures that volumetric error margins remain below 1.0%, protecting the quantitative validity of downstream growth hormone quantification assays, radioimmunoassays, and western blot procedures.
Analytical Validation: HPLC/MS Testing and Lot-Matched COAs
Every production lot sourced through PX1 Research undergoes mandatory third-party testing within an ISO 17025 accredited analytical laboratory. Identity and chemical purity are definitively established using High-Performance Liquid Chromatography (HPLC) coupled with Mass Spectrometry (MS). This dual-spectrum assay confirms molecular weight identification while measuring chromatographic peak area integration to establish overall sample purity.
A lot-matched Certificate of Analysis (COA) is published for every fill lot and is publicly accessible via our dedicated COA repository. In addition to HPLC chromatograms displaying purity thresholds exceeding 99.0%, each documentation suite includes bacterial endotoxin assay results (LAL test displaying < 0.05 EU/mg limits) and heavy metal screening, guaranteeing that analytical noise or cytotoxicity from raw material contaminants is eliminated from your experimental setups.
Comparative Analysis: MK-677 vs. GHRP-6, GHRP-2, and CJC-1295
When structuring secretagogue protocols, researchers frequently compare non-peptide GHSR agonists like MK-677 against classical peptide-based growth hormone secretagogues. Compounds like GHRP-6 and GHRP-2 also target the ghrelin receptor pathway to induce pituitary GH release in rodent models; however, as short-chain peptides, their biological half-life in vitro and in vivo is substantially shorter, requiring frequent administration or continuous infusion models.
In contrast, non-peptide structures such as MK-677 exhibit enhanced metabolic stability against enzymatic cleavage by dipeptidyl peptidase and circulating proteases. Furthermore, when compared against growth hormone-releasing hormone (GHRH) analogs like CJC-1295, which act directly upon the GHRH receptor rather than GHSR-1a, MK-677 provides a distinct mechanistic window for exploring dual-pathway synergistic activation in complex endocrine research systems.
Storage Protocols and Degradation Prevention
Maintaining chemical stability over extended research timelines demands strict adherence to thermal and environmental storage limits. Unreconstituted solid MK-677 reference standard should be kept in a desiccated freezer environment at -20°C for long-term preservation (up to 24 months), protected from light exposure using amber glass containers or opaque secondary packaging.
Once dissolved in liquid solution, working aliquots should be maintained at 2°C to 8°C for short-term active experimental protocols (less than 7 days) or ultra-frozen at -80°C for extended research periods. Exposure to UV radiation, ambient temperatures above 25°C, or basic liquid media with pH > 8.0 accelerates hydrolytic cleavage of the spiroindoline core, leading to measurable potency loss and invalidation of longitudinal research data.
Experimental Applications in Preclinical Secretagogue Models
In published preclinical research literature, MK-677 serves as a key reference compound for evaluating Somatotropic axis kinetics, bone mineral density modulation, and lean tissue preservation markers. Rodent models exposed to GHSR agonists display measurable increases in serum IGF-1 concentration alongside elevated mRNA expression of key anabolic receptors in skeletal muscle tissue assays.
In vitro models utilizing primary pituitary cell cultures leverage MK-677 to map receptor binding affinity, receptor internalizing pathways, and G-protein coupled cascade kinetics. By controlling micro-molar dosing environments, cellular biology researchers can precisely quantify peak secretagogue signaling without confounding inputs from systemic hypothalamic feedback loops.
Scaling Up: Bulk Sourcing and Batch Consistency
For multi-phase comparative trials, institutional research laboratories require consistent chemical purity across multi-gram or multi-vial series to prevent baseline drift between experimental cohorts. Variance in raw material synthesis protocols can introduce unlisted isomeric impurities that distort cellular assays or receptor binding kinetic models.
PX1 Research supports institutional procurement through standardized bulk synthesis runs and specialized institutional accounts available at wholesale. By maintaining identical raw material handling, GMP-compliant facility standards, and lot-by-lot HPLC/MS analytical screening, PX1 ensures that longitudinal datasets generated over multi-month assay timelines maintain total reproducibility across every experimental group.
Frequently Asked Questions
What is the molecular mass and purity standard of PX1 MK-677?
MK-677 mesylate has a formula mass of 624.77 g/mol. PX1 Research guarantees a minimum purity threshold of 99.0% as verified by HPLC/MS analysis performed by an independent ISO 17025 laboratory.
How do I calculate a 10 µM concentration from a 20mg MK-677 vial?
Using a molar mass of 624.77 g/mol, 20mg represents approximately 32.01 micromoles (µmol). Dissolving 20mg in 3.201 Liters yields 10 µM, or more practically, dissolving 20mg into 3.201 mL yields a 10 mM primary stock solution, which can then be diluted 1:1000 in assay buffer to achieve 10 µM.
Where can I locate the lot-specific Certificate of Analysis for my 20mg vial?
Every product shipped by PX1 includes a physical or digital lot tag. Enter the lot number on our official COA verification page at /coa to download the complete HPLC chromatogram, mass spec report, and endotoxin analysis.
Is MK-677 stable at room temperature during laboratory bench procedures?
Lyophilized or dry compound exhibits temporary stability at ambient temperature (20°C–25°C) during handling. However, reconstituted liquid stocks should be kept refrigerated at 2°C–8°C during short-term testing or frozen at -80°C for extended stability.
What solvent is recommended for dissolving MK-677 in cell culture assays?
MK-677 mesylate exhibits favorable solubility in dimethyl sulfoxide (DMSO), ethanol, or sterile laboratory-grade water depending on assay tolerance limits. Researchers should ensure final solvent concentrations in culture media do not induce solvent-related cytotoxicity.
What endotoxin threshold does PX1 enforce for research compounds?
All research lots undergo Chromogenic LAL testing to ensure bacterial endotoxin levels remain below 0.05 EU/mg, preventing cell culture contamination or pyrogenic interference in animal models.
How does MK-677 differ mechanistically from CJC-1295?
MK-677 is a non-peptide selective agonist of the ghrelin receptor (GHSR-1a), whereas CJC-1295 is a synthetic peptide analog of Growth Hormone-Releasing Hormone (GHRH) targeting GHRH receptors.
Can MK-677 be ordered in bulk packaging for institutional research?
Yes, PX1 Research provides institutional supply, custom packaging formats, and bulk volume procurement via our dedicated wholesale department at /wholesale.
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All products are sold strictly for laboratory and research use only. Not for human or veterinary use, diagnosis, treatment or consumption. Statements have not been evaluated by the FDA.