Category:
Preclinical Research Services
CAS NO:
66791-71-7
Standard:
USP, EP,
Calcitriol EP Impurity B is a reference standard for quality control, defined as 1,25-dihydroxyvitamin D3-26,27-lactone. Synthesized via photochemical cyclization and oxidation steps, its molecular formula is C27H40O4 (CAS: 98157-56-9).
Store at -20°C in dark, airtight containers to prevent photodegradation. Handle with PPE; avoid direct skin contact due to high biological potency.