Factory Supply 2-methylaniline Liquid CAS 95-53-4 Raw Materials

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Uses and synthesis of 2-methylaniline Liquid

2-methylaniline Liquid is one of the aromatic amine compounds (aromatic amines are compounds consisting of a benzene ring and an amine group). There are three types of isomers: neighboring, intermediate, and pairs of isomers.

2-methylaniline CAS 95-53-4, also known as "o-aminotoluene", is a colorless to light yellow liquid, becomes reddish brown when exposed to air and light, and produces white precipitate when met with formaldehyde. Slightly soluble in water, 2-methylaniline CAS 95-53-4 is soluble in dilute acid, alcohol, ether. Relative density: 1.004(20℃); Melting point: -16.3℃(β-type), -24.4℃(α-type); Boiling point: 199.7℃; Flash point: 85℃; Spontaneous ignition point: 482.2℃; Vapor density: 3.69. 2-methylaniline Raw Materials vapors and air can form explosive mixtures in the air the maximum allowable concentration of 5ppm. 2-methylaniline Raw Materials vapors and air can form explosive mixtures in the air the maximum allowable concentration of 5ppm. 2-methylaniline Raw Materials vapors and air can form explosive mixtures in the air the highest permissible concentration of 5ppm. The maximum permissible concentration in air is 5ppm. 2-methylaniline Raw Materials can be burned when it meets open fire, and will emit poisonous gas when it is subjected to high heat, the toxicity is similar to that of aniline, and it is easy to form methaemoglobin in the body, which will lead to neurological disorders and cyanosis.

2-methylaniline Liquid is an important intermediate in the production of dyestuffs and pigments, it can be used in the preparation of direct red 62, red base RL, red base G, date red base GBC, basic magenta, color phenol AS-D, acid red 35, 158, 265, solvent red 124, azo dyes diazo components and coupling components, the production of organic pigments yellow 14, 17, blue 19, and pesticide raw materials, the production of pesticide fungicides. Pesticide raw materials, the production of pesticides fungicide "tricyclazole", insecticide dicamba, insecticide amitraz; herbicide ethachlor; rubber vulcanization accelerator raw materials; saccharin raw materials; corrosion inhibitor raw materials, etc. 2-methylaniline CAS 95-53-4 in organic synthesis, 2- In organic synthesis, 2-methylaniline CAS 95-53-4 is also used to synthesize the heterocyclic compound indole and its derivatives.

Applications / Functions of 2-methylaniline Liquid

1. 2-methylaniline CAS 95-53-4 is used as an intermediate in dyestuffs, pesticides, pharmaceuticals and organic synthesis.
2. 2-methylaniline Liquid is used as analytical reagent and dye intermediate, also used in organic synthesis.
3. 2-methylaniline Raw Materials is the intermediate of fungicide tricyclazole, mefenoxam, furafenoxam, insecticide and acaricide insecticide amitraz, fenpropathrin, herbicide isobutylamine, diquat, ethopropamide, and so on, and is also the main intermediate of dyes, which can manufacture date red GBC, big red G, red RL, chromophenol As-D, acidic red 3B, alkaline magenta, etc., and can manufacture reactive dyes. It can also manufacture reactive dyes.
4. 2-methylaniline Raw Materials are used in the production of date red GBC, large red G, red RL, color phenol ASD, acid rosé 3B, basic magenta, basic rosé T and other dyes, as well as the pesticide pesticide amidophos, saccharin, sulfurization accelerator, mineral processing agent toluene arsenic acid and so on.

Physicochemical Property of 2-methylaniline Liquid

2-methylaniline Liquid is light yellow flammable liquid, turns reddish brown when exposed to air and sunlight. Slightly soluble in water, soluble in ethanol and ether.

production methodprocess of 2-methylaniline Liquid

• 1, in dilute acid medium, with o-nitrotoluene and iron powder, water together with heating to produce 2-methylaniline Liquid.
• 2, o-nitrotoluene and hydrogen preheated in an induction heater, and 2-methylaniline Raw Materials can also be produced by hydrogenation in the presence of a copper catalyst.
• 3, Toluene in the rhodium - carbon catalyst and sodium amide amination reaction to prepare 2-methylaniline CAS 95-53-4.
• 4, aniline in iron nitrate and germanium dioxide catalytic effect, and methanol alkylation reaction to prepare o-toluidine finished products.

o-Toluidine is produced from o-nitrotoluene by catalytic hydrogenation reduction. Due to the different hydrogenation catalyst, the reaction conditions vary, such as copper catalyst, reaction temperature 260 ° C, can also be used nickel catalyst. Refining method: according to different manufacturing methods, it contains m-toluidine, p-toluidine, nitrotoluene and other impurities. Especially p-toluidine has more content and contains trace water. The refining method is similar to that of aniline, but it is difficult to separate other toluidine by distillation. The crude o-toluidine is therefore first distilled twice, then dissolved in four times the volume of ether, and an equivalent solution of oxalic acid ether is added. The resulting p-toluidine oxalate was removed by filtration, and the resulting o-toluidine oxalate was filtered out after the filtrate was evaporated from the ether. It was recrystallized five times with water containing oxalic acid and then treated with sodium carbonate solution. Free o-toluidine dried with calcium chloride and distilled under reduced pressure three times to obtain 2-methylaniline CAS 95-53-4.

1. Obtained by reduction of o-nitrotoluene. Reduction reaction can use iron powder as reducing agent, can also be in the presence of copper catalyst at 260-280 ℃ hydrogenation reaction to produce o-toluidine. The content of industrial o-toluidine (total amino content) is above 99%, and the hydrogenation reduction method consumes 1300kg of o-nitrotoluene and 940m3 of hydrogen per ton of product.
2. The preparation method is to produce 2-methylaniline Raw Materials from o-nitrotoluene by catalytic hydrogenation reduction.Due to the different hydrogenation catalysts, the reaction conditions are different, such as copper catalysts, the reaction temperature is 260 ℃, and nickel catalysts can also be used.

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