RH
Exceptional purity for peptide research
We've been sourcing research-grade peptides for several years. Rainbow Peptide's vials consistently pass our HPLC verification — purity exceeds 98% every batch. COA matched our internal testing exactly.
HPLC Verified
>98% Purity
COA Included
SOMA Recovery & Tissue Repair
Ostarine (MK-2866)
$39.88
Ostarine (MK-2866, Enobosarm) is the most extensively studied SARM, with completed Phase II clinical trials in muscle wasting and cancer cachexia. ≥98% purity, third-party CoA. For Research Use Only.
In Stock — Overnight and 2–3 day delivery available
Product Information
Ostarine (MK-2866) Research Chemical
Ostarine (MK-2866, Enobosarm) is a selective androgen receptor modulator developed by GTx, Inc. It has the most extensive clinical research record of any SARM, including Phase II trials in cancer cachexia and muscle wasting (Papanicolaou et al., 2013). It reached Phase III development — further advanced than any other SARM.
Research Applications
- Muscle wasting and cachexia models (Phase II data available)
- Cancer cachexia research — most translatable SARM data set
- Bone density models
- AR agonism with high tissue selectivity vs testosterone
- Stress urinary incontinence research models
Product Specifications
- Purity: ≥98% HPLC confirmed
- Identity: Mass spectrometry (MW: 389.33)
- Certificate of Analysis: Independent third-party lab
- Form: Lyophilized powder, sealed glass vial
For Research Use Only (RUO). Not for human consumption.
Frequently Asked Questions
- What is Ostarine (MK-2866)?
- Ostarine (MK-2866, Enobosarm) is the most extensively studied SARM, with completed Phase II clinical trials in muscle wasting and cancer cachexia. ≥98% purity, third-party CoA. For Research Use Only.
- Is Ostarine (MK-2866) for sale at Rainbow Peptide?
- Yes. Ostarine (MK-2866) is available for purchase with Certificate of Analysis confirming >98% HPLC purity. Every order Overnight and 2–3 day delivery available. For Research Use Only.
- What purity is your Ostarine (MK-2866)?
- Rainbow Peptide's Ostarine (MK-2866) is >98% pure, HPLC verified by an accredited third-party laboratory. A COA is included with every order.
- Is Ostarine (MK-2866) safe for human use?
- No. Ostarine (MK-2866) is strictly For Research Use Only (RUO). It is not intended for human consumption and is not intended to diagnose, treat, cure, or prevent any disease.
- How quickly does Ostarine (MK-2866) ship?
- Overnight and 2–3 day delivery available. Ships in temperature-controlled packaging.
Third-Party Verified
Every Order Ships with a Certificate of Analysis
We don't just claim purity — we prove it. Every batch of Ostarine (MK-2866) is independently tested by an accredited third-party laboratory before it reaches you. Your COA is linked to your specific lot number.
- HPLC purity analysis — minimum threshold >98%
- Mass spectrometry — molecular weight confirmation
- Lot number traceable to your order
- Endotoxin limits verified — safe for cell-based assays
RAINBOW PEPTIDE LABS CERTIFICATE OF ANALYSIS
Product Ostarine (MK-2866)
Lot # RP-00188-A
HPLC Purity >98.0% >98.5% PASS
Mass Spec (MW) Confirmed Confirmed PASS
Endotoxin <1 EU/mg <0.5 EU/mg PASS
Visual Inspection White powder White powder PASS
What Researchers Say
Verified purchases from active research labs and scientists
5.00
★★★★★
2 verified reviews MT
Reliable consistency batch to batch
Third order now. Consistent batch-to-batch results matter enormously in long-term research. Certificate of Analysis is detailed with mass spec data. Would not switch sources.
SK
Solid product, shipping was fast
Verified against our reference standards. Purity >98.2% by HPLC. Packaging was appropriate for temperature-sensitive peptides. Will re-order.
