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Photo: Benzoin crystal  

  Gum Benzoin tonkinensis (Styrax), is a balsamic resin. Styrax Gum Benzoin tonkinensis is comming from Styrax family and the dried exudation from the pierced bark of Styrax Tree in Thailand.
As a gum from this species hardens, it becomes lump and pale yellowish color.
It is common to commercialized in powder form. It has a strong storax like odor and it also has more Benzoic Acid rather than Cinamic Acid (as found in Styrax tonkinensis). Because of its fragrant odor, it is widely used in: perfume, essential oil, aromatherapy, and sometimes in incense. It is well liked for its anti cataract and expectorant properties as well as its powerful skin healing effects.


Photo: Benzoin Styrax tonkinensis

English name: Benzoin
Botanical name: Styrax tonkinensis
Family name: Styraceae
Distribution: Indochina

Cas: 9000-72-0
Technical Analysis:
Optical +0.80 +0.79
Index Bias 1.4021 1.4022
Solubility Alcohol 95% (%) 89.88 89.85
Saponification Number 163.42 166.83
Acid Number 81.28 81.56
Benzoic Acid Ester 82.14 85.27
Cinamic Acid (%) 0.26 0.30
Benzoic Acid (%) 31.50 44.30

Photo: Benzoin Latex Properties:
Molecular formula C14H12O2
Molar mass 212.24 g mol−1
Appearance off-white crystals
Density 1.31 g/cm3
Melting point 132–137 °C
Boiling point 344 °C
Solubility in water Slightly Soluble
Solubility in Chlorine Soluble

Benzoic Acid [65-85-0]:Synonyms:Benzenecarboxylic Acid; benzeneformic acid; benzenemethonic acid; Benzoic acid; Benzoic acid? Diacylic acid; Carboxybenzene; Oracylic acid; phenyl carboxylic acid; phenylformic acid; retarded ba; retardex; tennplas;
Formula: C7 H6O2. Molecular Weight:122.1232 CAS RN:65-85-0 ACX Number:X1001262-5. Melting Point:122.4. Density:1.08. Vapor Density:4.2. Boiling Point:249. Flashing Point:121. Water Solubility:Slightly soluble. 0.34 g/100 mL RTECS:DG0875000.


PACKING: Poly or Jute bag 5 & 25kg or Metal drum



Photo: Benzoin board


All herbs

Adenosma indianum - Aegle marmelos Correa - Aganosma marginata - Adenosma indianum - Allium satium - Allium tuberosum - Aleo vera - Alpinia galanga - Alpinia officinarum - Alstonia scholaris - Amomum krervanh - Andrographis paniculata - Arachis hypogaea - Boesenbergia pandurata - Bridelia burmanica - Canaga odorata - Capsicum annuum - Capsicum frutescens - Carica papaya - Carthamus tinctorius  - Cassia angustifolia - Cassia tora - Centella asiatica - Cinnamomum cassia - Clitoria ternatea - Coriandrum sativum - Curcuma Longa - Cymbopogon citratus - Eclipta prostrata - Elettaria cardamomum - Equisetum arvense  - Ganoderma lucidum - Ginkgo biloba - Glycine max - Hibiscus rosa-sinensis - Illicium verum - Jasmine - Lycium barbarum - Medicago sativa - Momordica charantia - Morinda officinalis - Moringa oliefera - Myristica fragrans - Nelumbo nucifera - Ocymum basilicum - Panax ginseng - Perilla frutescens - Phaseolus vulgaris - Phyllanthus emblica - Piper nigrum - Plumeria alba - Plantago ovata - Ricinus - Sesamum indicum - Styrax tonkinense - Sassafras - Terminalia chebula  - Tribulus terrestris  - Zingiber officinale

- Lavit KHAM  B.Sc (Chemistry),B.Pharm, MPS,MAACP, MNHAA
Medicinal Plants of Cambodia Habitat, Chemical constituents and Ethno botanical Uses
Bendigo Scientific Press  – ISBN 0-646-43703-8  / 9780646437033
- Somanith BOUAMANIVONG & Onvilay SOURIYA – Ministry of Health, Traditional Medicine Research Center, Editor Prof. Dr. Bouhong SOUTHAVONG, Vientiane 2005.
- Lily, M. PERRY. Medicinal Plants of East and Southeast Asia, London, England 1978
- WHO Regional Publications, Western Pacific Series No 2
- Jules VIDAL, Noms vernaculaires de plantes (LAO, MEO, KHA) 1959
- Medicinal Plants in China 1989
- C. Pierce SALGUERO – A Thai Herbal, Traditional Recipes for Health and Harmony, 2005
Silkworm Books  – ISBN 974-9575-74-1 

- Dr. Sabine WILKINS Plant Physiology & Dr. Pauline Mc CABE Naturopathy, La Trobe University, Melbourne, Victoria Australia.
Prof. Roger KING, Pharmacology Toxicology, Monash University, Australia.
Chea SOK MENG, Cambodian pharmacist
Prof, Ka SUNBAUNAT Cambodian psychiatrist, Vice Dean, Faculty of Medicine, Phnom Penh.

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