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Isobutane 2.5, liquefied under pressure

liquefied under pressure
Purity 99,5 vol.%
Descriptions Isobutane 2.5

Impurities

Other hydrocarbons 5000 vol. ppm
Delivery formats In low pressure cylinders
Cylinders/container volumes 12 l 27 l 61 l
Content (kg) 5 11 25
Vapour Pressure (bar) 2,6 2,6 2,6

Unless otherwise stated, these refer to vapour pressure at 288,15K (15°C) and to content at 288,15K (15°C) and 1,013 bar.

Properties highly flammable
Valve connection DIN 477 No. 1 | (W 21.80 x 1/14 LH)
Shoulder colour flame red (RAL 3000)

Conversions

m3 kg l liquefied
1 at 288.15 K (15°C); 1 bar 1,000 2,500 4,209
1 kg 0,400 1,000 1,684
1 l liquid at T boiling point; 1 bar 0,238 0,594 1,000

Other delivery formats

on request ; Alumini® 12, 200 Isobutane 2.5 ; in low pressure cylinders: Isobutane 2.5, 3.5 and Isobutane as refrigerant (R-600a)

Physical Data

Molar mass 58,12 g mol-1
Liquid State
Boiling Point 261,45 (-11,7) K (°C)
Heat of Evaporation 366,8 kJ kg-1
Liquid Density 593,4 kg m-3
Gaseous state
Density (at 273.15 K and 1.013 bar) 2,65 kg m-3
Density Ratio to Air (at 288.15 K and 1.013 bar) 2,01
Specific heat (at 298.15 K and 1.013 bar) 1,67 kJ kg-1 K-1
Thermal Conductivity (at 288.15 K and 1.013 bar) 0,0152 J s-1 m-1 K-1
Critical Point
Temperature 408,13 (135,0) K (°C)
Pressure 37,2 bar
Density 221 kg m-3
Triple Point
Temperature 113,7 (-159,5) K (°C)
Vapour Pressure 5 x 10^-5 bar
Heat of Fusion 78,2 kJ kg-1
Additional operating figures
Ignition Point 733 (459,9) K (°C)
Ignition Range in Air 1,5-9,4 vol.%
Calorific Value to DIN 51850 133000 kJ kg-3

Typical applications

Suitable pressure regulators:

WEGA range: see brochure: "Good on Top: Pressure Regulators for Specialty Gases".
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