According to van Romburgh, the leaves of Caesalpinia Sappan, L., the leguminous tree which supplies the sappan wood used for dyeing, yields 0,16 to 0,2 p. c. of an almost colorless volatile oil: d28o0,825; aD + 37°30' to + 50° 30'. The bulk of the oil boils at 170°. The odor is pepper-like and reminds of phellan-drene. The amount of phellandrene nitrite which separates when the oil is treated with sodium nitrite and glacial acetic acid, is so large as to lead to the assumption that the bulk of the oil consists of d-phellandrene. During the distillation of the leaves van Romburgh observed the occurrence of methyl alcohol5).