Chemical properties of ethyl benzoate

Ethyl benzoate is an organic compound with the molecular formula c9h10o2. It is a colorless transparent liquid with a slight smell of fruit. Insoluble in water, slightly soluble in hot water, miscible with ethanol, ether, petroleum ether, propylene glycol, chloroform, mineral oil and most non-volatile oils, and insoluble in glycerol. It naturally exists in peach, pineapple, gooseberry and black tea. It is found in flue-cured tobacco leaves. It is used to prepare perfume, essence and artificial essential oil, and is also widely used in food.

chemical property

1. the chemical properties of ethyl benzoate are relatively stable. It is hydrolyzed in the presence of caustic soda to produce benzoic acid and ethanol. It is heated to 305 ℃ in the sealed pipe, and some parts are decomposed. It decomposes into acetylene, hydrogen, carbon monoxide, carbon dioxide and a small amount of methane under electric spark. Heating to 400 ℃ in the presence of thorium oxide produces benzoic acid and ethylene. Ethyl benzoate and sodium ethanol are relatively stable when heated to 120 ℃. However, it can be decomposed into sodium benzoate and ether at 160 ℃. Ethyl benzoate reacts with chlorine at 200 ℃ to obtain benzoyl chloride and a small amount of acetyl chloride. It is heated to 170 ~ 270 ℃ with bromine to produce benzoic acid and bromoethylene. It reacts with phosphorus pentachloride at 140 ℃ to produce chloroethane and benzoyl chloride.

2. ethyl benzoate reacts with lithium aluminum hydride in ether solution to produce benzyl alcohol. When heated with ammonia at about 500 ℃ in the presence of alumina or thorium oxide, benzylnitrile and ethylene are formed. It reacts with ammonia at 200 ℃ to form benzoamide. Ethyl benzoate can form crystalline complexes with various metal salts, tin chloride, aluminum trichloride, titanium chloride, magnesium iodide, antimony pentachloride, etc. most of these crystalline complexes are unstable and easy to decompose in the air.

3. ethyl benzoate and trifluoroacetic acid can not only form bimolecular exciplex, but also form 2:1 trimolecular exciplex. It is formed by the formation of bimolecular exciplex and the interaction with ethyl benzoate, rather than through the dimer of ethyl benzoate.

4. it is slightly toxic. The acute toxicity LD50 was 6500mg/kg (orally in rats).

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