3-Methylpentane
1,2,3- trimethylolpropane
Colorless liquid with an odor phenolartigem
Liquid
0.66 g · cm -3
-118 ° C
63 ° C.
203 mbar ( 20 ° C)
Practically insoluble in water
1.376 at 20 ° C.
Risk
Template: Infobox chemical / molecular formula search available
3-methylpentane (also Diethylmethylmethan ) is one of the five structural isomers of hexane.
Representation and extraction
3-methyl pentane in the oil occurs. A technical synthesis is achieved by the reaction of n- butane with ethylene at 400 ° C and 200 bar in the presence of homogeneous catalysts such as phosphorus.
Properties
3-methylpentane is a flammable, volatile, colorless liquid with phenolartigem odor. At atmospheric pressure, the compound boils at 63 ° C. The vapor pressure function is given by Antoine corresponding log10 (P) = A- ( B / ( T C )) ( P in bar, T in K) with A = 3.97377, B = 1152.368 and C = -46.021 in temperature range from 289 K to 337 K.
The most important thermodynamic properties are listed in the following table:
The temperature dependence of the enthalpy of vaporization can be determined according to equation ΔVH0 = A · exp (- β · Tr ) (1- Tr) β ( ΔVH0 in kJ / mol, Tr = (T / Tc) reduced temperature ) with A = 45.24 kJ / mol, β = 0.2703 and Tc = 504.4 K describe the temperature range between 298 K and 353 K.
Temperature dependence of the heat of vaporization of 3-methyl propane
Use
3-methyl pentane is used as a diluent for fast drying coatings, printing inks and adhesives. Furthermore, it is also used on the fuel, fuel and lubricant sector. The connection also serves as a reference substance in spectroscopy and chromatography.
Safety
3-methylpentane forms flammable vapor - air mixtures. The compound has a flash point of less than -7 ° C. The explosive range is between 1.2 vol % (40 g/m3) as the lower explosive limit ( LEL) and 7.0 % by volume (250 g/m3 ) and upper explosive limit (UEL ). Will be assigned in the explosion group IIB). The ignition temperature is 300 ° C. The fabric falls within the temperature class T3.