25-Hydroxyvitamin D3 3-Hemisuccinate is a conjugate of 5-Hydroxyvitamin D3 (C125700), the principal circulating form of vitamin D3, formed in the liver by hydroxylation at C-25. Calcium regulator. Also used in the preparation and synthesis of antisera to be used in the immunoassay of 25-Hydroxyvitamin D3. Melting Point: As ReportedSolubility:As ReportedMethod for Determining Identity:Proton NMR (CDCl3, DSMO-d6) and and Mass Spectrometric AnalysisTLC Conditions:As ReportedElemental Analysis:As ReportedChloroform Content:As ReportedStorage and Stability:Long-term storage is recommended at -70°C under Inert gas. For maximum recovery of product, centrifuge the original vial prior to removing the cap. Hygroscopic and temperature sensitive. Store under Inert atmophere. Moisture and LIght sensitive.Important Note: This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological. Toxicity and Hazards: All products should be handled by qualified personnel only, trained in laboratory procedures.