原料介紹｜澳洲尤加利 (Eucalyptus australia)

▎精油簡介

澳洲尤加利(Eucalyptus radiata)，又稱為桉樹或俗稱孤獨樹，它是澳洲木本植物中代表性的樹種，一般為常綠喬木，數高達30m，整體樹形成金字塔狀，樹皮為灰色纖維狀，葉片較薄，葉子通常互生，有柄，全緣羽狀脈，多為鐮刀形；枝、葉、花有芳香；早春開白色、紅色或黃色花，多為繖形或頭狀花序。同屬的尤加利樹由於適應澳洲各種不同的地理氣候，其覆蓋率遍及整個澳洲。

因生長速度很快，對水的需求量較大。因為尤加利樹的經濟價值與種植成活率較高，澳洲東部的30至50種尤加利樹，為澳洲的代表樹種，也是無尾熊的主要食物，看到尤加利就很自然地想到無尾熊抱吃的畫面。

尤加利樹本身帶有的揮發性芳香油是許多蚊蟲不喜歡的味道，是含氧率很高的一種精油，對於淨化空氣，清潔呼吸系統都有十分顯著的效果。

▎成分解析

｜主要成分：氧化物

澳洲尤加利含有高比例氧化物(1,8-桉油醇)，同時還含有單萜醇、單萜烯、單萜酮等其他分子結構，所產生的協同作用具有一定醫療價值，如：α-蒎烯，檸檬烯，α-萜品醇，順式胡椒醇，牻牛兒醇等。

｜成分1：1.8-桉油醇 (1,8 cineole)

尤加利具有高含量的1,8-桉樹腦，商業上可用於製藥和化妝品工業中的精油生產。且被廣泛種植用於紙漿，膠合板和實木的生產，其葉子芳香油具有令人震驚的廣泛生物活性。

｜成分2：右旋萜品烯-4-醇(Terpinen-4-ol)

要特別注意放置太久的萜品烯-4-醇會氧化成香荊芥酚，具皮膚刺激性。

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▎參考文獻

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