Description
With this OTR-AC powder you get OTR-AC as loose powder. Each batch is tested by LC-MS to 99% purity or higher. It’s $88.99. It’s sold for laboratory research only.
The same compound comes in other formats too: OTR-AC liquid, OTR-AC gel packs and OTR-AC capsules. You’ll find similar products in our SARM powders range.
What is OTR-AC?
OTR-AC is the acetate ester of ostarine, sometimes listed as ostarine-O-acetate. The acetate group is added to the hydroxyl on the ostarine backbone, which changes how the molecule is handled in metabolism while the core androgen receptor binding structure stays the same.
It’s a newer research compound than ostarine and has far less published data, so most interest comes from comparing it directly with the parent SARM.
OTR-AC powder specifications
- Compound: OTR-AC (Ostarinyl Acetate (MK2886 acetate), Ostarine acetate (MK2886 acetate), Ostarine acetate ester (MK2886 acetate ester))
- CAS number: 1025658-44-9
- Molecular formula: C21H16F3N3O4
- Molecular weight: 431.37
- Purity: 99% or higher, tested by LC-MS
- Amount: 1g
- Form: Loose powder
- Storage: Keep it in a cool, dry place away from direct sunlight
- Use: laboratory research only, not for human or veterinary use
What studies say about OTR-AC
There are no published clinical trials of OTR-AC itself. Researchers who work with it usually lean on the ostarine literature, including the 2013 enobosarm phase 2 trial in The Lancet Oncology, and treat OTR-AC as a modified form to compare against.
That makes it a good fit for side-by-side work: same receptor target, slightly different chemistry.
You can find the papers on PubMed. We don’t make claims beyond what that literature reports.
Working with loose OTR-AC powder
Buying OTR-AC as a powder gives you full control. Weigh out exactly what your protocol calls for, make up your own solutions, or encapsulate it yourself.
For small amounts you’ll want a scale that reads to at least 0.01g, and ideally 0.001g. Our digital scale and micro scoops make it easier to get consistent measurements. Weigh onto clean weighing paper, and close the bag or jar straight after so the powder doesn’t pick up moisture.
Making a solution from OTR-AC powder
To make a stock solution, decide on the final volume and concentration first. For 30mL at 10mg/mL you’d weigh 300mg of OTR-AC, dissolve it in about 25mL of solvent, then top up to exactly 30mL.
Check the compound’s solubility in your chosen solvent before you start, and try a small test amount first. Store the finished solution in a labelled glass bottle.
Purity testing for OTR-AC
We test each batch of OTR-AC by LC-MS, which pairs liquid chromatography with mass spectrometry. The chromatography splits the sample into its components and the mass spectrometer identifies them, which tells you both identity and purity. This batch came in at 99% or higher.
Small differences between batches are normal, so write the batch number from the label into your records. If something looks wrong when your order arrives, like discoloured powder or a cloudy solution, set it aside and don’t use it.
Storing your OTR-AC
Keep it in a cool, dry place away from direct sunlight. Use a clean, dry scoop each time, and reseal the container straight away. Label anything you decant with the compound, amount and date, and keep it out of reach of children and pets.
Common questions about the OTR-AC powder
What can I dissolve OTR-AC powder in?
That depends on the compound’s solubility and your protocol. Check the solubility data for your solvent first, and test a small amount before making up a full batch.
What scale do I need?
One that reads to 0.01g at minimum, and 0.001g for very small amounts. Our pocket scale reads to 0.01g.
Is the OTR-AC powder in stock?
Yes. Every option on this page is in stock and ready to ship.
Related SARMs
Similar products in this format include RAD-140 (testolone) powder, Ostarine (MK-2866) powder, RAD-150 (TLB-150) powder and MK-777 powder. Our main SARMs page lists everything in the category.
Buy OTR-AC powder online
It’s simple. Add it to your cart and check out. The OTR-AC powder is in stock and ready to ship. While you’re here, our lab supplies cover the pipettes, scales and solutions most studies need.
Sold for laboratory research use only. It isn’t for human or veterinary use, and it isn’t a food, drug or cosmetic.
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