Benzoin Gum

a resin that hardens rapidly in air. It is obtained by tapping the trunks and branches of the storax tree (Styrax benzoin) of the family Styracaceae, which grows wild and is cultivated in Southeast Asia and on the islands of the Malay Archipelago. It has a pleasant odor owing to the presence of vanillin and cinnamic and (in certain types) benzoic acids. It is used in the perfume industry.