(1S)-Calcitriol is the 3-epi stereoisomer of calcitriol (1α,25-dihydroxyvitamin D3), an active vitamin D metabolite used as a research reagent in VDR signaling, biochemical assays, and analytical standards. Supplied as a concentrated DMSO stock, it is intended for in vitro studies and should be handled protected from light and stored under recommended cold conditions.
- Potent vitamin D receptor agonist for VDR-related assays and mechanistic studies.
- Provided as a 10 mM solution in DMSO, 1 mL convenient stock format.
- Chemical identity: 1α,25-dihydroxy-3-epi-vitamin D3 (CAS 61476-45-7).
- Molecular weight 416.64 g·mol⁻¹.
- Store protected from light; in solution keep at -80°C up to 6 months or -20°C up to 1 month.