| Appearance | Almost colourless to pale yellow colored liquid | 
			| Purity (by GC) | Min 99.8% | 
			| Water | Max 0.05% | 
			| Specific gravity (at 20°C) | 1.031 - 1.033 | 
			| Refractive index (20°C; 589 nm) | Approx 1.470 | 
			| Boiling range (at 760 mm Hg) | 202 - 203 deg C | 
			| Boiling range (at 10 mm Hg) | 78 - 79 deg C |