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Table 17-1

PropertySevofluraneDesfluraneIsofluraneEnfluraneNitrous Oxide
Boiling point (ºC)59244957–88
Vapor pressure at 20ºC (mm Hg)15766923817238,770
Molecular weight (g)20016818418444
Oil:gas partition coefficient471991971.4
Blood:gas partition coefficient0.650.421.461.90.46
Brain:blood solubility1.71.31.61.41.1
Fat:blood solubility47.527.244.9362.3
Muscle:blood solubility3.12.02.91.71.2
MAC in oxygen, 30–60 years old, 37ºC, PB760 (%)1.86.61.171.63104
MAC in 60%–70% nitrous oxide (%)0.662.380.560.57
MAC, >65 years old (%)1.455.171.01.55
PreservativeNoNoNoNoNo
Stable in moist carbon dioxide absorbentNoYesYesYesYes
Flammability (%) (in 70% nitrous oxide/30% oxygen)101775.8
Recovered as metabolites (%)2–50.020.22.4

MAC = minimum alveolar concentration.