ChemicalBook > Product Catalog > Flavors and fragrances > Synthetic fragrances > Carboxylic acids and esters > Aliphatic dicarboxylic acid esters > Methyl butyrate
Methyl butyrate Chemical Properties
- Melting point:-85--84°C
- Boiling point:102-103 °C(lit.)
- Density 0.898 g/mL at 25 °C(lit.)
- vapor density 3.5 (vs air)
- vapor pressure 40 mm Hg ( 30 °C)
- FEMA 2693 | METHYL BUTYRATE
- refractive index n
- Flash point:53 °F
- storage temp. Flammables area
- solubility water: soluble60 part
- form Liquid
- color Clear colorless to very slightly yellow
- explosive limit1.6%(V)
- Odor Threshold0.0071ppm
- Water Solubility Slightly soluble in water.
- JECFA Number149
- Merck 14,6035
- BRN 1740743
- Stability:Stable. Flammable. Incompatible with strong bases, strong oxidizing agents.
- CAS DataBase Reference623-42-7(CAS DataBase Reference)
- NIST Chemistry ReferenceButanoic acid, methyl ester(623-42-7)
- EPA Substance Registry SystemMethyl butyrate (623-42-7)
Methyl butyrate Usage And Synthesis
- DescriptionMetyhl butyrate occurs naturally in apples, apricot, blackberry, nectarine etc. It is used as a flavor ingredient in fruit and rum flavoring for beverages, ice cream, candy, and baked goods. Methyl butyrate is also used to synthesize butyraldehyde.
- References Ruth Winter, A Consumer's Dictionary of Food Additives, 7th Edition, 2009
 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
- DescriptionMethyl butyrate, also known under the systematic name methyl butanoate , is the methyl ester of butyric acid. Like most esters, it has a fruity odor, in this case resembling apples or pineapples. 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 mm Hg at 30 °C ), so it can be safely handled at room temperature without special safety precautions.
Methyl butyrate is present in small amounts in several plant products, especially pineapple oil. It can be produced by distillation from essential oils of vegetable origin, but is also manufactured on a small scale for use in perfumes and as a food flavoring.
Methyl butyrate has been used in combustion studies as a surrogate fuel for the larger fatty acid methyl esters found in biodiesel. However , studies have shown that, due to its short-chain length, methyl butyrate does not reproduce well the negative temperature coefficient (NTC) behaviour and early CO2 formation characteristics of real biodiesel fuels. Therefore, methyl butyrate is not a suitable surrogate fuel for biodiesel combustion studies.
- Chemical PropertiesMethyl butyrate 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. May be prepared from methyl alcohol and butyric acid in the presence of concentrated H2S04.
- Chemical PropertiesMethyl butyrate has an apple-like odor and corresponding sweet taste that is not very powerful. Below 100 ppm, methyl butyrate may have a banana–pineapple flavor
- Chemical Propertiescolourless liquid
- OccurrenceReported found in apple, apricot, orange, grapefruit and tangerine juice, cranberry, blueberry, guava, grapes, melon, papaya, pineapple, blackberry, strawberry, tomato, blue, cheddar and parmesan cheese, butter, milk, egg, beef, white wine, coffee, tea, honey, olive, passion fruit, plum, mushroom, starfruit, mango, fig, prickly pear, wood apple, soursop, cherimoya, myrtle berry, kiwifruit, mountain papaya, custard apple, nectarine, naranjilla, spineless monkey orange and pawpaw
- UsesMethyl 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.
- Usesmanufacture of artificial rum and fruit essences.
- Production MethodsMethyl butyrate is produced from methyl alcohol and butyric acid in the presence of concentrated sulfuric acid .
- PreparationFrom methyl alcohol and butyric acid in the presence of concentrated H2SO4.
- Aroma threshold valuesDetection: 1 to 43 ppb. Aroma characteristics at 1.0%: pungent, ethereal, fruity, fumey and fusel with a fermented, cultured, creamy undernote.
- Taste threshold valuesTaste characteristics at 10 ppm: fruity and apple-like with a sweet almost buttery, nutty and creamy nuance, fusel-like, impacting, and estry with a cultured dairy, acidic depth.
- Synthesis Reference(s)Tetrahedron Letters, 29, p. 1759, 1988 DOI: 10.1016/S0040-4039(00)82035-3
- General DescriptionA clear colorless liquid. Flash point 57°F. Less dense than water and slightly soluble in water. Hence floats on water. Vapors heavier than air.
- Air & Water ReactionsHighly flammable. Slightly soluble in water.
- Reactivity ProfileMethyl 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 .
- HazardFlammable, dangerous fire risk.
- Health HazardIrritating to the eyes, nose, throat, upper respiratory tract, and skin.
- Fire HazardHIGHLY 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.
- Safety ProfileModerately 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.
- CarcinogenicityNot listed by ACGIH, California Proposition 65, IARC, NTP, or OSHA.
- Purification MethodsTreat the ester with anhydrous CuSO4, then distil it under dry nitrogen. [Beilstein 2 IV 786.]
Methyl butyrate Preparation Products And Raw materials
- Preparation ProductsMETHYL 4-(4-(BIS(2-CHLOROETHYL)AMINO)PHENYL)BUTYRATE5-ETHYL-2-THIOURACIL
- Chlorambucil Methyl (R)-(-)-3-hydroxybutyrate Methyl isobutyrate Methyl thiobutyrate Methyl 4-chlorobutyrate Methyl Methyl 2-bromo-2-methylpropionate 4-Aminobutyric acid Methyl bromide Bensulfuron methyl Ethyl 2-bromohexanoate Ethyl 2-bromovalerate Ethyl 2-bromoheptanoate DL-Ethyl 2-bromobutyrate Methyl butyrate 3-Indolebutyric acid Sodium Butyrate Methylparaben
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