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Journal of Thai Traditional & Alternative Medicine Vol. 7 No. 2-3 May-December 2009 ÒÛÛ

Abstract
Specification of Chan Daeng (Heartwood of Pterocarpus santalinus L. f.)
†
Supaporn Phonchan*, Sawanee Sathornviriyapong , Nantana Sittichai ‡
Chayan Picheansoonthon* ,§
*Pharmaceutical Botany and Pharmacognosy Unit, Faculty of Pharmaceutical Sciences, Khon Kaen University,
Khon Kaen 40002, Thailand
† Department of Botany, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
‡ Department of Medical Sciences, Ministry of Public Health, Nonthaburi 11120, Thailand
§ The Academy of Science, The Royal Institute, Sanam Suea Pa, Khet Dusit, Bangkok 10300, Thailand
Although Chan Daeng (heartwood of Pterocarpus santalinus L. f.) is a crude drug frequently used as an
ingredient in Thai traditional herbal recipes for antipyretic, antinociceptive and cardiotonic, its pharmaco-
poeial standard has not yet been established for the Thai Herbal Pharmacopoeia. Therefore, this study was
aimed at establishing the specification of Chan Daeng. Microscopically, the crude drug showed characteristic
scattered solitary vessel cells of diffuse porous wood, paratracheal xylem parenchyma, and uniseriate
homocellular xylem ray. Phytochemical screening of its ethanolic extract indicated the presence of terpenoid
compounds. Physico-chemical specifications, i.e. foreign matter, moisture content, total ash, and acid-insoluble
contents of Chan Daeng were proposed as being not more than 0.002, 8.0, 1.0 and 0.02 percent w/w, respec-
tively, while ethanol-soluble extractive and water-soluble extractive were set as not less than 12.0 and 1.5
percent w/w, respectively. These results will be useful for the quality control of Chan Daeng, including herbal
remedies composed of Chan Daeng.
Key words: standard specification, Chan Daeng, Pterocarpus santalinus L. f.