- ≥98% by HPLC with identity confirmation; lot-matched COA available
- Lot-matched certificate of analysis
- Ships next business day, tracked
MK-2866 (Ostarine)
Enobosarm — non-steroidal selective androgen receptor modulator, capsules or liquid
- FormOral capsules in a sealed bottle, or solution in a 30 mL dropper bottle
- Mol. weight389.33 g/mol
- Research areasAndrogen receptor pharmacology, tissue-selective anabolic signalling, muscle-wasting and bone-density models, doping-control analysis
Supplied for laboratory research use only. Not for human or veterinary use, and not intended to diagnose, treat, cure or prevent any disease.
Overview
SARMs were designed around a pharmacological question: whether a ligand can engage the androgen receptor with tissue-selective downstream consequences — measurable anabolic activity in muscle and bone with a different profile in prostate and other reproductive tissue than that of testosterone or synthetic anabolic steroids. That selectivity is generally attributed to ligand-specific receptor conformations, differential coregulator recruitment and the absence of 5-alpha-reductase and aromatase conversion, since ostarine is not a steroid.
Specifications
Identity
- CAS number
- 841205-47-8
- Molecular formula
- C19H14F3N3O3
- Molecular weight
- 389.33 g/mol
Supply & purity
- Form
- Oral capsules in a sealed bottle, or solution in a 30 mL dropper bottle
- Purity
- ≥98% by HPLC with identity confirmation; lot-matched COA available
- Solubility
- Poorly water soluble; soluble in ethanol, DMSO and polyethylene glycol vehicles
Additional detail
- Available options
- 10 mg × 60 capsules; 30 mL liquid at 20 mg/mL
- Also known as
- Ostarine, enobosarm, GTx-024, S-22
- Compound class
- Non-steroidal selective androgen receptor modulator (aryl-propionamide)
- Molecular target
- Androgen receptor (NR3C4), partial agonist activity in the reported literature
- Metabolic note
- Not a substrate for aromatase or 5-alpha-reductase
- Research areas
- Androgen receptor pharmacology, tissue-selective anabolic signalling, muscle-wasting and bone-density models, doping-control analysis
- Storage
- Cool, dry conditions away from direct light; refrigeration extends shelf stability
Questions about MK-2866 (Ostarine)
Is MK-2866 a peptide?
No. Ostarine is a small non-steroidal organic molecule of the aryl-propionamide class, formula C19H14F3N3O3 and mass 389.33 g/mol. It is catalogued alongside research peptides because the same laboratories study it, not because of any structural relationship.
What formats are available?
Two: a bottle of 60 capsules at 10 mg each, and a 30 mL solution at 20 mg/mL for volumetric work. The capsule format gives fixed unit content; the solution suits dilution series and vehicle-controlled in-vitro or animal-model designs.
Is it third-party tested?
Yes. Each lot is analysed by an independent laboratory using HPLC with identity confirmation, and a lot-matched Certificate of Analysis is available for the batch supplied. Match the lot number on the container to the COA before recording any data.
What is ostarine's regulatory status?
It is not approved by the FDA for any indication and is not a lawful dietary supplement ingredient; the FDA has publicly warned against SARM-containing products sold for body-building. It is also prohibited in sport by WADA under the anabolic agent category.
How is it stored?
Keep both formats cool, dry and out of direct light, with the container sealed. Refrigeration extends shelf stability and is the usual choice for the solution. Allow a chilled container to warm before opening so that condensation does not affect the contents.
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