P-Cymene

  • 4- isopropyl toluene
  • P- isopropyl toluene
  • Dolcymen
  • Camp Hogen
  • 1 -methyl-4 -isopropylbenzene
  • 4- Methylcumol

Colorless liquid with aromatic odor

Liquid

0.86 g · cm -3

-67.94 ° C

177.1 ° C

1.45 mbar ( 20 ° C)

Practically insoluble in water

1.4907 (20 ° C)

Attention

4750 mg · kg -1 ( LD50, rat, oral)

Template: Infobox chemical / molecular formula search available

P- cymene, also referred to as Dolcymen or Camp Hogen, is an aromatic hydrocarbon, more precisely an alkylbenzene, and is one of the terpenes. It is a colorless, flammable liquid with a characteristic odor. Together with his two isomers it belongs to the group of cymenes and also to the C4 - benzenes.

Biological Significance

P- cymene has no proven biological task, yet it is found in many plants. The three main plants Chenopodium ambrosioides ( epazote ) (730 to 8000 ppm in the plant ), Peumus boldus ( Boldo ) ( 6000-7500 ppm in the leaves ) and Satureja hortensis ( Simple savory ) (300 to 6000 ppm in the plant ).

Use

P- cymene is a common ligand for ruthenium complexes. The starting compound is [( η6 -cymene ) RuCl2 ] 2]. This half-sandwich complex is prepared by the reaction of ruthenium (III ) chloride with the terpene α -phellandrene. The osmium complex is also known.

Safety

The flash point of the liquid is 47 ° C, at the ignition temperature of 435 ° C. In air volume fractions from 0.7 to 5.6 %, it forms explosive mixtures. A MAK value is not defined for p- cymene.

When inhaled p- cymene leads to dizziness, drowsiness and vomiting. The skin reddens and degreased it skin and eyes. Swallowing the liquid diarrhea, headache, nausea, unconsciousness, vomiting and drowsiness leads.

CAS registry number PubChem Vapor pressure Dangerous Substances Directive (67/548/EEC) Alkylbenzenes Dysphania ambrosioides Half sandwich compound CRC Handbook of Chemistry and Physics Digital Object Identifier
9002
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