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外観
白色〜黄褐色, 塊、又は融解時、無色〜黄褐色, 澄明〜わずかな微濁の液体
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溶解性
エタノール、アセトン、水酸化ナトリウム溶液にとけ、水にほとんど溶けない。水に不溶。エタノール、エーテルに可溶。
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解説
C11H22O2(186.29)．CH3(CH2)9COOH．ウンデカン酸は，キク科マンシュウアサギリ草Artemisia frigida中に存在する．ひまし油中にも少量含まれている．10-ウンデセン酸を水素付加すると得られる．無色の鱗(りん)片状結晶．融点28 ℃，沸点284 ℃．d20"0.9948．nD70"1.4203．水に不溶，エタノール，エーテルに可溶．エステルの合成原料として用いられる．10-ウンデセン酸同様，皮膚疾患に薬効がある．森北出版「化学辞典（第2版）
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用途
エステルの製造原料に用いられる。
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説明
Undecanoic acid is a saturated fatty acid containing eleven carbons (C11:0). It is cytotoxic to certain filamentous fungi and is used to study fungal mechanisms of resistance. Undecanoic acid is also used to acylate larger molecules.
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化学的特性
white to pale yellowish low melting solid
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天然物の起源
Occurs naturally in butter and in the oil of Artemisisa frigida Willd.; also reported found in the oils of
Chamaecyparis pisifera Engl., wild thyme, Thymus marschollianus and coconut. Also reported found in apple, banana, sour cherry,
lemon and mandarin peel oil, grapefruit juice, guava, grapes, papaya, many cheeses, milk powder, chicken and beef fat, cooked mutton,
cured pork, beer, cognac, rum, whiskies, white wine, tea, coconut milk, beans, licorice, mango, mushrooms, rice, sake, wort,
loquat, scallop and maté.
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使用
Intermediates of Liquid Crystals
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製造方法
By reduction of undecylenic acid obtained from castor oil.
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定義
ChEBI: A straight-chain, eleven-carbon saturated medium-chain fatty acid found in body fluids; the most fungitoxic of the C7:0 - C18:0 fatty acid series.
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一般的な説明
White crystalline solid. Insoluble in water. Specific gravity 0.85. Hence floats on water.
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空気と水の反応
Dust explosion is possible. [USCG, 1999]. Insoluble in water.
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反応プロフィール
A weak carboxylic acid. Neutralizes bases with the evolution of substantial amounts of heat to produce water plus a salt. Reacts with solutions of cyanides to cause the release of gaseous hydrogen cyanide. Can generate flammable and/or toxic gases and heat by reaction with diazo compounds, dithiocarbamates, isocyanates, mercaptans, nitrides, and sulfides. Reacts in with aqueous solutions of nitrites and thiosulfates (to give H2S and SO3) and dithionites (to give SO2) and heat. Reaction with solutions of carbonates and bicarbonates generate a harmless gas (carbon dioxide) but still heat. Can be oxidized by strong oxidizing agents and reduced by strong reducing agents. These reactions generate heat. May initiate polymerization reactions. May serve as a catalyst.
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健康ハザード
May be harmful by inhalation, ingestion or skin absorption. Material is irritating to mucous membrane and upper respiratory tract. Causes eye and skin irritation.
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火災危険
Special Hazards of Combustion Products: Dust explosion is possible.
