Siam Benzoin


💊 Chemical information

Benjoin du Laos; Benjuí de Siam; Bensoe, Siam; Bentsoe, Siam; Benzoe tonkinensis; Benzoino derva; Benzoová pryskyřice siamská.
CAS — 9000-72-0.


In Chin. and Eur.. Also in some pharmacopoeias under the title benzoin and should not be confused with Sumatra benzoin. Jpn and US allow both Siam benzoin and Sumatra benzoin under the title Benzoin.

Ph. Eur. 6.2

(Benzoin, Siam). The resin obtained by incising the trunk of Styrax tonkinensis. It has a characteristic odour of vanillin and contains 45.0 to 55.0% of total acids, calculated as benzoic acid, and with reference to the dried drug. Protect from light.

USP 31

(Benzoin). A balsamic resin from Styrax tonkinensis, or other species of the Anthostyrax section of the genus Styrax (Styracaceae). It yields not less than 90% of alcohol-soluble extractive. It occurs as pebble-like tears of variable size and shape, compressed, yellowish-brown to rusty brown externally, milky white on fracture, separate or very slightly agglutinated, hard and brittle at ordinary temperatures but softened by heat. It has an agreeable, balsamic, vanilla-like odour.

💊 Profile

Siam benzoin has been used similarly to Sumatra benzoin. It has also been used as a preservative and was formerly used in the preparation of benzoinated lard. Preparations of Sumatra and Siam benzoins are used in aromatherapy.

💊 Preparations

USP 31: Compound Benzoin Tincture; Podophyllum Resin Topical Solution. Proprietary PreparationsMulti-ingredient: Braz.: Dermol†; Fr.: Balsolene; Borostyrol; Homeoplasmine; Inotyol†; Israel: Inotyol; Ital.: Ondroly-A†; Switz.: Borostyrol N†.
Published May 08, 2019.