シトロネラ油 化学特性,用途語,生産方法
定義
本品は、コウスイガヤ Cymbopogon nardus の葉から水蒸気蒸留によって得られる精油である。
解説
スリランカ，ジャワ，台湾などに産するイネ科のカヤの一種Cymbopogon(またはAndropogon)nardusの全草を水蒸気蒸留すると得られる．シトロネラ油は，淡黄色ないし黄褐色の芳香油．産地によりd15150.885～0.920．n20D1.463～1.494と幅がある．主成分はd-シトロネラール，ゲラニオール，d-シトロネロール，酢酸シトロネロール，酢酸ゲラニオールなど．そのまま安価なせっけん用の香料として用いられるほか，シトロネラール，ゲラニオール系香料の製造，メントールの合成原料などに使用される．
森北出版「化学辞典（第2版）
化粧品の成分用途
香料
説明
Citronella oil is present as a repellent in many sprays
that contain other repellents, pyrethrins, and synergists.
These formulations have insecticidal and repellent actions
against biting insects and flies on cattle, dogs, horses, and
pigs. The major constituent of citronella oil is citronellal
(to which the information below applies).
化学的特性
Sri Lanka (Ceylon) citronella oil is produced by steam distillation of fresh
or partly dried leaves and stems of the grass species Cymbopogon nardus
(L.) Rendle – the so-called lenabatu – cultivated in Sri Lanka. It is a pale
yellow to brownish liquid with a fresh, grassy, camphoraceous odor.
d
2020 0.891–0.910; n
20D 1.479–1.490; α
20D ?25 ° to ?12 °; solubility: 1 vol in
not more than 2 vol of 80% ethanol at 20 ℃; ester number (after acetylation):
157–200; carbonyl number: min. 18, corresponding to min. 5% of carbonyl compounds (calculated as citronellal).The content of citronellal by
GC varies from 3% to 6%. Other typical constituents are borneol (4–7%),
citronellol (3–8.5%), geraniol (15–23%), and methyl isoeugenol (7–11%).
Sri Lanka (Ceylon) oil is less valuable than Java oil and is used almost
exclusively for perfuming toilet soaps, washing powders, and household
products. Annual production is only ～25 t.
物理的性質
The Ceylon oil is a pale yellow to yellowish-brown liquid. The Java-type oil is a clear, mobile,
light yellow to brownish liquid.
天然物の起源
Found in the grasses of Cymbopogon Nardus (Rendle), Andropogon Nardus (L) and Andropogon Nardus Ceylon, de Jong (Fam. Gramineae).
使用
Soap perfumery, manufacture of hydroxycitronellal, insect repellent.
製造方法
By direct steam-distillation of the dried grass.
定義
Has both d- and l-isomers. C
9H17CHO.
精油の成分
The main constituents of citronella oil are geraniol and citronellal
シトロネラ油 上流と下流の製品情報
原材料
準備製品