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[Chemical Knowledge]：Properties and Uses of o-Cresol

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O-cresol, also known as 2-methylphenol or 2-hydroxymethylbenzene, is an important organic chemical raw material. Its molecular formula is C7H8O, structural formula is CH3C6H4OH, belonging to phenolic compounds. O-cresol has a wide range of properties and uses, and plays an important role in the field of chemical production raw materials.

1. the nature of o-cresol

1. physical properties: o-cresol is colorless to pale yellow transparent liquid, with a special smell. Its boiling point is 199~200 ℃, melting point is 9~11 ℃, relative density is 1.037, refractive index is 1.5417, flash point is 86 ℃. o-cresol slightly soluble in water, miscible in ethanol, ether, benzene, chloroform, acetone and other organic solvents.

2. chemical properties: o-cresol phenolic hydroxyl and methyl on the hydrogen atom has a certain activity, can occur substitution, oxidation, condensation and other reactions. For example, ortho-cresol can react with concentrated sulfuric acid to generate ortho-cresol sulfonic acid; under alkaline conditions, ortho-cresol can react with aldehydes to generate phenolic resin.

2. the use of o-cresol

1. synthetic resins and plastics: o-cresol can be used as raw materials, and formaldehyde condensation reaction to generate phenolic resin, used in the manufacture of insulating materials, wear-resistant materials, anti-corrosion materials. In addition, o-cresol can also be used in the production of epoxy resin, polycarbonate and other plastics.

2. synthetic fibers: o-cresol can be used to produce polyester, nylon and other synthetic fibers to improve the heat resistance, weather resistance and wear resistance of the fibers.

3. pharmaceutical intermediates: o-cresol can be used as pharmaceutical intermediates for the production of fungicides, disinfectants, analgesics and other drugs.

4. pesticides: o-cresol can be used to produce pesticides, such as fungicides, pesticides, etc., to improve the ability of crops to resist diseases and pests.

5. spices: o-cresol has a special smell and can be used to produce spices, such as vanillin.

In conclusion, as an important organic chemical raw material, o-cresol has a wide range of uses in the field of chemical production raw materials. With the continuous progress of science and technology and the continuous expansion of application fields, the application prospect of o-cresol will be broader.

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