[en] Gaharu (Agar wood) is a secondary metabolite produces by the Aquilaria spp. and accumulates in the plant cell in oleoresin form. The essential oil known as gaharu oil can be extracted from this oleoresin gaharu via varies extraction method such as the water distillation, solvent extraction, pressurize extraction and etc. The gaharu oil extracted through different methods will give different fragrances. Besides, different source of materials will also give different in chemical profiles. In gaharu oil trading market, most of the buyers request quality assurance from the gaharu oil manufacturer to assure the gaharu oil purchased meets their standard requirement. Since there is a demand on gaharu oil quality assurance then it become a need to develop the gaharu oil quality control method in order to have a standard quality control of gaharu oil presented in a certificate of analysis and verified by laboratory. (author)