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Tetracosane, also called tetrakosane, is an alkane hydrocarbon with the structural formula H(CH 2) 24 H. As with other alkanes, its name is derived from Greek for the number of carbon atoms, 24, in the molecule. It has 14,490,245 constitutional isomers, [2] and 252,260,276 stereoisomers. [3]
Example of a 1,2-diol (Ethyleneglycol, top),a 1,3-diol (1,3-Propanediol, middle)and a 1,4-diol (1,4-Butanediol, bottom).An alkanediol, composed of alkane and diol, are a group of substances consisting of linear or branched hydrocarbon chains containing exactly two hydroxy groups at different positions.
Alkanes play a negligible role in higher organisms, with rare exception. Some yeasts, e.g., Candida tropicale, Pichia sp., Rhodotorula sp., can use alkanes as a source of carbon or energy. The fungus Amorphotheca resinae prefers the longer-chain alkanes in aviation fuel, and can cause serious problems for aircraft in tropical regions. [39]
Alcohols applied to the skin are used to disinfect skin before a needle stick and before surgery. [2] They may also be used as a hand sanitizer; [2] to clean other areas; [2] and in mouthwashes. [3] [4] [5] Taken by mouth or injected into a vein, ethanol is used to treat methanol or ethylene glycol toxicity when fomepizole is not available. [1]
Liquid paraffin, also known as paraffinum liquidum, paraffin oil, liquid paraffin oil or Russian mineral oil, is a very highly refined mineral oil used in cosmetics and medicine. Cosmetic or medicinal liquid paraffin should not be confused with the paraffin (i.e. kerosene) used as a fuel.
Medical use of alkaloid-containing plants has a long history, and, thus, when the first alkaloids were isolated in the 19th century, they immediately found application in clinical practice. [206] Many alkaloids are still used in medicine, usually in the form of salts widely used including the following: [ 14 ] [ 207 ]
It is a semifluorinated alkane. [4] Perfluorohexyloctane has been available in multiple markets since 2015 under the brand names Evotears and Novatears, [5] and was additionally approved for medical use in the United States in May 2023 under the brand name Miebo.
The predominant use of hydrocarbons is as a combustible fuel source. Methane is the predominant component of natural gas. C 6 through C 10 alkanes, alkenes, cycloalkanes, and aromatic hydrocarbons are the main components of gasoline, naphtha, jet fuel, and specialized industrial solvent mixtures.