23357-18-8 Usage
General Description
25-hydroxy previtamin D3 is a chemical compound that serves as an intermediate in the synthesis of vitamin D3 in the skin. It is produced when UVB radiation from the sun converts 7-dehydrocholesterol in the skin into previtamin D3, which is then converted into 25-hydroxy previtamin D3 in the liver. 25-hydroxy previtamin D3 is the main form of vitamin D found in the bloodstream and is used as a marker to assess a person's vitamin D status. Adequate levels of 25-hydroxy previtamin D3 are important for maintaining bone health, immune function, and overall well-being. Deficiency of 25-hydroxy previtamin D3 can lead to conditions such as rickets, osteoporosis, and increased risk of infections.
Check Digit Verification of cas no
The CAS Registry Mumber 23357-18-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,3,5 and 7 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 23357-18:
(7*2)+(6*3)+(5*3)+(4*5)+(3*7)+(2*1)+(1*8)=98
98 % 10 = 8
So 23357-18-8 is a valid CAS Registry Number.
23357-18-8Relevant academic research and scientific papers
14-Epi stereoisomers of 25-hydroxy- and 1α,25-dihydroxyvitamin D3: Synthesis, isomerization to previtamins, and biological studies
Maynard,Trankle,Norman,Okamura
, p. 2387 - 2393 (2007/10/02)
The C-14 epimers of vitamin D, 14-epi-25-hydroxyvitamin D3 (4) and 14- epi-1α,25-dihydroxyvitamin D3 (5), were synthesized, and their isomerization via [1,7]-sigmatropic hydrogen shifts to the corresponding previtamin forms (4' and 5
