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

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The nature and use
of o-toluidine
, the nature of o-toluidine

o-toluidine (o-toluidine) is an organic compound, molecular formula C7H9N. It is a colorless to light yellow oily liquid with a strong ammonia odor. o-Toluidine has a boiling point of 199~200 ℃, a melting point of -9.5 ℃, a relative density of 0.967(20/4 ℃), a refractive index of 1.5598, and a flash point of 81 ℃. It is difficult to dissolve in water, but can be dissolved in ethanol, ether, benzene, acetone and chloroform and other organic solvents.

o-toluidine is basic and can react with an acid to form a salt. The hydrogen atom on the amino group (-NH2) in the structure has certain activity, and can undergo substitution reaction, oxidation reaction, etc. In addition, o-toluidine is also reductive and can be oxidized to o-methylquinone.

2. the use of o-toluidine

o-toluidine is an important chemical raw material, widely used in dyes, pharmaceuticals, pesticides, rubber and other fields. The following are the main uses of o-toluidine:

1. Dye field: o-toluidine is an important intermediate for the synthesis of dyes, which can be used to prepare dyes of various colors, such as red, orange, yellow, etc. It can be used for dyeing cotton, linen, silk, wool and other fibers.
2. pharmaceutical field: o-toluidine can be used as pharmaceutical intermediates for the preparation of antibacterial drugs, anti-inflammatory drugs, anti-cancer drugs and other drugs. For example, it can be used in the synthesis of sulfonamides and quinolones.
3. Pesticide field: o-toluidine can be used to prepare pesticides, fungicides and other pesticides. It can be used as an active ingredient to improve the insecticidal and bactericidal effects of pesticides.
4. Rubber field: o-toluidine can be used as a rubber additive to improve the strength and wear resistance of rubber. It can be used to prepare rubber anti-aging agents, accelerators, etc.

In conclusion, as an important chemical raw material, o-toluidine is widely used in dyes, pharmaceuticals, pesticides, rubber and other fields.

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