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a fraction of petroleum or gas condensate. Boiling interval, 120°-240°C; density, 785–795 kg/m3, viscosity, 1.2 centistokes (20°C); cloud point, not above — 60°C. Ligroin was originally manufactured as motor fuel for tractors. However, since the conversion of the tractor fleet to diesel engines, it has lost its importance as a motor fuel and is now used mainly in instrument-making (in fluid-filled devices) and sometimes as a solvent.