Enflurane

Enflurane (2-chloro-1,1,2,-trifluoroethyl-difluoromethyl ether) is a halogenated ether that was commonly used for inhalational anaesthesia during the 1970s and 1980s. Developed by Ross Terrell in 1963, it was first used clinically in 1966.

Enflurane is a structural isomer of isoflurane. It vaporizes readily, but is a liquid at room temperature.

Clinically, enflurane produces a dose-related depression of myocardial contractility with an associated decrease in myocardial oxygen consumption. Between 2% and 5% of the inhaled dose is oxidised in the liver, producing fluoride ions and difluoromethoxy-difluoroacetic acid. This is significantly higher than the metabolism of its structural isomer isoflurane.

Physical properties
Molecular weight 184.5 g/mol  
Boiling point (at 1 atm): 56.5 °C  
MAC : 1.68  
Vapor pressure: 172 mmHg (at 20°C)  
Blood:Gas Partition Coefficient: 1.9  
Oil:Gas Partition Coefficient: 98

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