6-chloro-2-nitrotoluene

Use: it is an important intermediate of dyestuff and agricultural pesticide, and it also can be used to synthesizes 3-chloro-2-methylaniline, 2,6- dichlorobenzonitrile. Needle-shaped crystal, soluble in ethanol, insoluble in water. Can be volatilized with water vapor. Melting point 37.8 °C. Boiling point 238 °C. Flash point 125 °C. Refractive index 1.5377 (1.5). Refractive index 1.5377 (69 ° C). Produced from o-nitrotoluene by chlorination. Properties: needle crystal, soluble in ethanol, insoluble in water. Can be volatile with water vapor. Preparation method: chlorinated from o-nitrotoluene. First o-nitrotoluene, anhydrous ferric chloride (catalyst), added to the reactor, at 50-60 ℃ into the chlorine, until the relative density of the reactants up to 1.27-1.29 (48-50 ℃) or 1.31-1.32 (26-28 ℃) until. Wash with 5% hydrochloric acid for three times, then wash with water for two times, and finally add liquid alkali to adjust the pH to 7. Separate the aqueous layer, evaporate the water, and then pressurize and fractionally distill, collect the fraction at 120-150 ℃ (5.33-8.0 kPa), cool it down, and then precipitate the crystals. Filtered to obtain the finished product. The yield is more than 40%.