酪酸メチル 化学特性,用途語,生産方法
外観
無色澄明の液体
溶解性
水に微溶 (1.56g/100ml), エタノール, エーテルに易溶。エタノール及びアセトンに溶けやすく、水にやや溶けにくい。
用途
マスキング香料、食品香料
用途
有機合成原料。香料材料。
説明
Methyl butyrate, also known as methyl butanoate , is an ester with a fruity odor pineapple, apple, and strawberry. At room temperature, it is a colorless liquid with low solubility in water, upon which it floats to form an oily layer. Although it is flammable, it has a relatively low vapor pressure ( 40 mmHg at 30°C), so it can be safely handled at room temperature without special safety precautions.
化学的特性
Methyl butyrate is colourless liquid that has an apple-like odor and a corresponding sweet taste that is not very powerful. Below 100 ppm, it may have a banana-pineapple flavor. Miscible in ethanol and ether, slightly soluble in water (1:60). May be prepared from methyl alcohol and butyric acid in the presence of concentrated H2S04.
天然物の起源
Metyhl butyrate occurs naturally in pineapple oil, round grapefruit juice, apple juice, kiwi and mushrooms. It is used as a flavor ingredient in fruit and rum flavoring for beverages, ice cream, candy, and baked goods.
使用
Methyl butyrate is used as a solvent for ethylcellulose
and nitrocellulose resins. It is also used in lacquers
and perfumes and in the manufacture of rum and fruit
flavors.
製造方法
Methyl butyrate is produced from methyl alcohol and butyric acid in the presence of concentrated sulfuric acid. The synthesis of methyl butyrate by the reaction between butyric acid and methanol with acidic ion exchange resin as a catalyst in presence of ultrasound irradiation was successfully carried out.
主な応用
Methyl butyrate is an important raw material and intermediate used in organic synthesis, pharmaceuticals, agrochemicals and dyestuff fields.
定義
ChEBI: Methyl butyrate is a fatty acid ester.
一般的な説明
Methyl butyrate appears as a clear colorless liquid. Flash point 57°F. Less dense than water and slightly soluble in water. Hence floats on water. Vapors heavier than air.
空気と水の反応
Highly flammable. Slightly soluble in water.
反応プロフィール
Methyl butyrate reacts exothermically with acids to generate alcohols and carboxylic acids. Strong oxidizing acids may cause a reaction that is sufficiently exothermic to ignite the reaction products. Heat is also generated by interaction with basic or caustic solutions. Flammable hydrogen is generated by mixing with alkali metals and hydrides .
危険性
Flammable, dangerous fire risk.
健康ハザード
Irritating to the eyes, nose, throat, upper respiratory tract, and skin.
火災危険
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water.
安全性プロファイル
Moderately toxic by
ingestion and skin contact. A skin irritant. A
very dangerous fire hazard when exposed to
heat, flame, or oxidizers. Can react
vigorously with oxidizing materials. To fight
fire, use alcohol foam, CO2, dry chemical.
When heated to decomposition it emits
acrid smoke and irritating fumes. See also
ESTERS.
職業ばく露
Methyl butyrate, one of the odorous compound present in different types of adhesive (hotmelt, vinyl acetate ethylene, starch, polyvinyl acetate and acrylic) used in food packaging, was identified by GC-O-MS (gas chromatography–mass spectrometry–olfactometry).
発がん性
Not listed by ACGIH, California
Proposition 65, IARC, NTP, or OSHA.
純化方法
Treat the ester with anhydrous CuSO4, then distil it under dry nitrogen. [Beilstein 2 IV 786.]
参考文献
[1] Ruth Winter, A Consumer's Dictionary of Food Additives, 7th Edition, 2009
[2] Laurent Ducry and Dominique M. Roberge, Dibal-H Reduction of Methyl Butyrate into Butyraldehyde using Microreactors, Organic Process Research & Development, 2008, vol. 12, 163-167
酪酸メチル 上流と下流の製品情報
原材料
準備製品