Introduction

The two main species used to produce sandalwood oil are Santalum album (East Indian sandalwood) and S. spicatum (Australian sandalwood). S.album is a small evergreen tree that grows to 30 feet. With fragrant wood and ovate leaves, the tree has dull yellow to maroon flowers followed by dark red to black fruits.1 Native to Ceylon, India, Indonesia, and their surrounding islands, S. album grows wild on Celebes and on the Portuguese island of Timor.3 East Indian sandalwood oil is obtained from S. album by steam or water distillation of the heartwood (the innermost and oldest wood). S. spicatum is a small west Australian wild tree. Australian sandalwood oil is obtained from this tree by a combination of solvent extraction and steam distillation of the wood.

Modern Research

There are currently very few studies being done on sandalwood. One published study investigated sandalwood oil in the form of a patch applied to the skin instead of as an inhaled fragrance. The study focused on whether sandalwood had physiological and behavioral arousal properties.

 Future Outlook

East Indian sandalwood is currently an endangered botanical species. The Indian government has placed certain restrictions on it, such as prohibiting removal of sandalwood trees until they reach 30 years of age and limiting exportation of the tree and oil. These restrictions have forced prices up and, unfortunately, have led to an emergence of sandalwood oil being sold to distillers on the black market.Although thought by some to be inferior to East Indian sandalwood, Australian sandalwood is becoming more commercially viable due to the dwindling availability of the Indian species. Australian sandalwood is being increasingly commercially produced in Western Australia. The hope is that science will discover new methods to increase heartwood, and thus increase sandalwood oil production.