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Menadiol is an organic compound with the formula C 6 H 4 (COH) 2 (CH)(CH 3). It is formally a derivative of p-hydroquinone. The name vitamin K 4 can refer to: specifically this compound, [1] [2] its various esters, e.g. menadiol diacetate (acetomenaphthone), [3] [4] menadiol dibutyrate, [4] menadiol dimalonate, or [2] its various salts, like
It is almost insoluble in cold water, slightly soluble in petroleum ether, and more soluble in polar organic solvents. In alkaline solutions it produces a reddish-brown color. Vitamin K is a derivative of 1,4-naphthoquinone. It is a planar molecule with one aromatic ring fused to a quinone subunit. [2] It is an isomer of 1,2-naphthoquinone.
Vitamin K is a family of structurally similar, fat-soluble vitamers found in foods and marketed as dietary supplements. [1] The human body requires vitamin K for post-synthesis modification of certain proteins that are required for blood coagulation ("K" from Danish koagulation, for "coagulation") or for controlling binding of calcium in bones and other tissues. [2]
Vitamin K is a fat-soluble vitamin that is stable in air and moisture but decomposes in sunlight. [17] K 1 is a polycyclic aromatic ketone, based on 2-methyl-1,4-naphthoquinone, with a 3-phytyl substituent.
Menadione is a synthetic [3] [4] organic compound with the formula C 6 H 4 (CO) 2 C 2 H(CH 3). It is an analog of 1,4-naphthoquinone with a methyl group in the 2-position. [5] It is sometimes called vitamin K 3. Use is allowed as a nutritional supplement in animal feed because of its vitamin K activity.
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The following chart shows the solubility of various ionic compounds in water at 1 atm pressure and room temperature (approx. 25 °C, 298.15 K). "Soluble" means the ionic compound doesn't precipitate, while "slightly soluble" and "insoluble" mean that a solid will precipitate; "slightly soluble" compounds like calcium sulfate may require heat to precipitate.
Micelle formation is essential for the absorption of fat-soluble vitamins and complicated lipids within the human body. Bile salts formed in the liver and secreted by the gall bladder allow micelles of fatty acids to form. This allows the absorption of complicated lipids (e.g., lecithin) and lipid-soluble vitamins (A, D, E, and K) within the ...
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