chemical composition
1, Sumatran benzoin main resin containing about 90%, the composition of 3-cinnamoyl sume resin ester (3-cinnamoyl sumaresinolic acid), coniferyl cinnamate (coniferyl cinnamate), cyhalogen (styracin cinnamoylcin- namate) 2 1% to 3%, vanillin 1%, phenylpropyl cinnamate 1%, and free benzoic acid and cinnamic acid. The total benzoic acid content is 10% to 20%, and the total cinnamic acid content is 10% to 30%. [1]
2, Vietnamese benzoin main containing resin 70% to 80%, the composition of 3-benzoylsia resin acid ester (3-benzoylsia resin acid), coniferyl benzoate (coniferyl benzoate), free benzoic acid 20%, vanilla Aldehyde 0.15% to 2.3%, does not contain cinnamic acid.
3, found in China domestic powder benzoin, benzoin Castle white and benzoin white leaves, their resin total balsamic acid, followed by 31%, 28%, 27 to 28%, and balsamic acid is completely benzoic acid, the other One was reported to be 31.09%, 25.67%, 21.17 to 31.46% (100% of the ethanol-soluble resin).
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