Calciol is a hydroxy seco-steroid that is (5Z,7E)-9,10-secocholesta-5,7,10(19)-triene in which the pro-S hydrogen at position 3 has been replaced by a hydroxy group. It is the inactive form of vitamin D3, being hydroxylated in the liver to calcidiol (25-hydroxyvitamin D3), which is then further hydroxylated in the kidney to give calcitriol (1,25-dihydroxyvitamin D3), the active hormone. It has a role as a human metabolite. It is a seco-cholestane, a hydroxy seco-steroid, a member of D3 vitamins, a secondary alcohol and a steroid hormone.
Synonyms: 5,6-trans-vitamin D3; (3b,5E,7E)-9,10-Secocholesta-5,7,10(19)-trien-3-ol; calciol; cholecalciferol; colecalciferol
Molecular Formula: C27H44O
Molecular Weight: 384.64
Linear Structural Formula: C27H44O
Purity: >=90% (HPLC)
Storage: -20C