Cholecalciferol

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Cholecalciferol
Systematic name	(3β,5Z,7E)-9,10-secocholesta-5,7,10(19)-trien-3-ol
Common name	vitamin D3
Chemical formula	C27H44O
Molecular mass	384.64 g/mol
Density	x.xxx g/cm3
Melting point	83-86 °C
Boiling point	xx.x °C
CAS number	[67-97-0]
SMILES	xxxx
Disclaimer and references

Cholecalciferol is a form of Vitamin D, also called vitamin D₃. 7-Dehydrocholesterol is the precursor of vitamin D₃ and only forms the vitamin after being exposed to UV irradiation. After exposure to the sun, cholecalciferol is sent to the liver to be hydroxylated where is becomes 25-Hydroxyvitamin D3. Next, it is sent to the Kidney and once again hydroxlyated becoming 1,25-Hydroxyvitamin D3. 1,25-Hydroxyvitmain D3 is the active hormone form of vitamin D₃. It is structurally similar to steroids such as testosterone, cholesterol, and cortisol (though vitamin D₃ itself is a secosteroid).

1g of pure vitamin D₃ is 40 000 000 (40x10⁶) IU, or in other words, one IU is 0.025 μg.

Vitamins
Retinol (A) | B vitamins (Thiamine (B1), Riboflavin (B2), Niacin (B3), Pantothenic acid (B5), Pyridoxine (B6), Biotin (B7), Folic acid (B9), Cyanocobalamin (B12)) | Choline | Ascorbic acid (C) | Ergocalciferol and Cholecalciferol (D) | Tocopherol (E) | Naphthoquinone (K)