Methyl butyrate

• Methylbutyrate
• Butyric acid methyl ester

Colorless liquid with an odor fruchtartigem

Liquid

0.90 g · cm -3 ( 20 ° C)

-84 ° C

103 ° C.

32 hPa ( 20 ° C)

1.6 g/100 g of water ( 21 ° C)

1.3878 (20 ° C)

Risk

Template: Infobox chemical / molecular formula search available

Butyric acid methyl ester ( methyl butyrate, methyl butanoate ), CH3CH2CH2COOCH3, is an ester with fruit odor reminiscent of apple or pineapple. Butyric acid methyl ester is obtained by acid-catalyzed reaction of methanol with butyric acid ( butanoic acid ). In nature it is found for example in bananas and strawberries.

Properties

Butyric acid methyl ester is a colorless liquid that boils at normal pressure at 102 ° C. The heat of evaporation under normal conditions is 39.3 kJ mol - 1, at the boiling point 33.79 kJ · mol -1. The vapor pressure function is given by Antoine corresponding log10 (P) = A- ( B / ( T C )) ( P in bar, T in K) below the atmospheric pressure boiling point with A = 4.58499, B = 1528.058 and C = -41.606 in the temperature range of 246 K to 375 K and above the atmospheric pressure boiling point of A = 4.72086 B = C = -2.421 1758.314 and in the temperature range of 375 K to 545 K.

The connection is above the flash point flammable vapor -air mixtures. It has a flash point of 14 ° C. The lower explosive limit (LEL) is 1.6 vol - % ( 67 g · m -3).

Use

Butyric acid methyl ester is used in perfumes and as an odorant. The ester was used as a model substance for the study of biodiesel, however, proved unsuitable.