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Benjoin Siam is a balsamic resin from Styrax tonkinensis (Pierre) Craib ex Hartwitch tree, which belongs to the Styracaceae family. It is collected directly from the tree, cleaned and sorted into grades according to size. The production is entirely manual, from tapping to packaging. It is variously referred to as Benjoin Siam, Benjoin Vietnam, Benjoin Laos or in a generic way as “benzoin gum”. Vietnam & Laos are considered as the major producer of Benjoin Siam, if not the only two at present.
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Tapping Benjoin tree
Benjoin Siam is commercialized after it has been cleaned and sorted into three grades, according to its size: grade 1- large tears; grade 2 – medium tears; grade 3 – small tears and powder. The various grades do not present any significant variation of the chemical composition but are the result of the cleaning process. They can have only an impact on the colour of the product during the storage at ambient temperature (from beige to brown colour).
The product presents a strong vanilla smell, is insoluble in water and soluble in ethanol.
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Benjoin Resin
Ready processed for export, Benzoin Siam appears as pieces which are opaque, grainy, ovoid, flattened (almonds), from few to 30 mm, white-yellow.
After storage at ambient temperature, Benzoin Siam can slightly melt and appears as agglomerated brown-red mass. Its colour turns reddish outside due to air exposure but stays white- yellow inside.
Besides Benzoin Siam, another type of benzoin is produced, Benzoin Sumatra, obtained from two other Styrax species, Styrax benzoin Dryander and Styrax paralleloneurum Perkins. These two resins differ in their botanical source, geographical origin and chemical composition. The term “benzoin gum” can include one or the other of the two sources or their mixtures.
![](https://benjoinsiam.com/wp-content/uploads/2023/11/z1197893898271_fb0771fe956d15ec9f42be5779cd3b60.jpg)
Packing benjoin siam
In Benjoin Siam, the main constituents are benzoic acid and its esters (such as coniferyl benzoate and benzyl benzoate), while in Benzoin Sumatra the major constituents are cinnamic acid and its esters (such as coniferyl cinnamate and cinnamyl cinnamate). Vanillin is present in both types of benzoin resins and gives rise to its familiar vanilla odour (most readily detected in the Siam type).
Chemical characterization:
The product can be described as white-yellow to reddish splits of flattened almond-like grains with a strong vanilla smell. The resin is composed mainly by benzoic acid (15-45 %) and coniferyl benzoate (15-60%), with lesser amounts of vanillin (<5%), benzyl benzoate (<2%), 2-hydroxy-1- phenylethanone and 1-(4-hydroxy-3-methoxyphenyl)-2-propanone.
Functional uses:
Benjoin Siam used as a flavour additive can be considered as a flavour enhancer, flavour stabiliser, flavour support and a flavour fixer. Those functionalities are likely to improve the flavour stability and thus the organoleptic properties of the preparation.