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Isobutylbenzene

Isobutylbenzene structure

Isobutylbenzene 

structure
  • CAS No:

    538-93-2

  • Formula:

    C10H14

  • Chemical Name:

    Isobutylbenzene

  • Synonyms:

    Benzene,(2-methylpropyl)-;Benzene,isobutyl-;(2-Methylpropyl)benzene;Isobutylbenzene;2-Methyl-1-phenylpropane;iso-Butylbenzene;NSC 24848;i-Butylbenzene

  • Categories:

    Pharmaceutical Intermediates  >  Bulk Drug Intermediates

Description

CLEAR COLOURLESS LIQUID

Isobutylbenzene Basic Attributes

134.22

134.22

1852218

208-706-2

29029000

Characteristics

0

4.09

Liquid

0.8540 g/cm3 @ Temp: 20 °C

-51.4 °C

172.7 °C

131 °F

1.490

H2O: INsoluble

Flammables area

4.2 mm Hg ( 37.7 °C)

Oral-rat LDL0: 5000 mg/kg

Flammable; spicy and irritating smoke is emitted from the fire

0.8-6%(V)

Safety Information

III

3

UN 3295 3/PG 3

3

10-36/37/38-50/53

26-36-61-60

DA3550000

Xi,N

Treasury is ventilated, low temperature and dry; stored and transported separately from oxidant

Its vapor and air can be explosive

P261-P305 + P351 + P338

H226-H315-H319-H335

Toxicity

practically nontoxic

Isobutylbenzene Use and Manufacturing

Methods of Manufacturing

It is obtained from toluene and propylene as raw materials by side chain alkylation in the presence of an alkali metal catalyst. Using potassium metal as a catalyst, the amount of potassium used per mole of toluene is 0.02g moles (K/Na2CO3=4:1). The reaction temperature is 190-205°C, the pressure is 2.94MPa, the reaction time is 1.5-2.0h, and the ratio of propylene to toluene is 1:1. This method has good orientation, high yield, single product and simple processing technology. The pure product is obtained after rectification. The toluene conversion rate is 54.53%, the isobutylbenzene selectivity is 89.6%, and the isobutylbenzene yield is 48.88%.

Uses

Used in organic synthesis. It is the raw material for the production of the analgesic and antipyretic drug ibuprofen intermediate (isobutylacetophenone). It is also used to produce coatings, plasticizers and surfactants. Can also be used as a solvent.

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