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There are many types of organic solvents, according to their chemical structure can be divided into 10 categories: (1) aromatic hydrocarbons: benzene, toluene, xylene, etc.; , dichlorobenzene, dichloromethane, etc.; (5) alcohols: methanol, ethanol, isopropyl alcohol, etc.; (6) ethers: ether, epoxy propane, etc.; (7) esters: methyl acetate, ethyl acetate, propyl acetate, etc.; (8) ketones: acetone, methamphetamine, methamphetamine, etc.; (9) Glycol derivatives: ethylene glycol monoethylene ether, glycol monoethyl ether, ethylene glycol monocetather, etc.;
Organic solvents have fat-soluble, so in addition to the respiratory tract and digestive tract into the body, but also through the complete skin rapid absorption, organic solvents absorbed into the human body, will act on lipid-rich nerves, blood systems, as well as liver and kidneys and other essential organs, at the same time the skin and mucous membranes also have a certain degree of irritation. The main target organs and the strength of the action of different organic solvents are also different, which is determined by the chemical structure, solubility, contact concentration and time of each organic solvent, as well as the sensitivity of the body .
order of commonly used solvents: water (maximum polarity> methylamide >acetylamide> methanol>ethanol>propanol> acetone> II> Oxygen hexa> tetrahydrofuran> methyl ethyl >zheng butanol> ethyl acetate >ethyl ether> isopropyl ether> dichloromethane> chlorine Imitation > ethane>>chloropropane> toluene > carbon tetrachloride> carbon disulfide >carbon> cyclohexane> > the polarity of kerosene (least polarity)
organic solvents can be judged according to the function group and symmetry, the specific need to refer to the polarity parameters, as follows:
common organic solvent polarity table