The product is white crystalline powder.
Purity by HPLC is not less than 98.0%.
Water content ≤ 0.5%.
Residue on ignition ≤ 0.1%.
Heavy metals < 10 ppm.
All indexes meet pharmaceutical intermediate and reference standard grade specifications.
Ostarine-d4 is a deuterium-labeled selective androgen receptor modulator (SARM), used primarily as an internal standard in bioanalytical assays.
It is applied in LC-MS/MS quantification of Ostarine in biological matrices (plasma, urine, tissue) for pharmacokinetic, forensic doping, and drug metabolism studies.
Deuterium labeling improves mass spectrometry detection accuracy and reduces matrix interference.
Also used in pharmaceutical R&D for method validation, stability testing, and metabolite identification of Ostarine-based drug candidates. 
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