Density 0.753 g/mL at 25 ° C (lit.) Boiling point 35-36 ° C Melting point -115.8 ° C Refractive index n20/D 1.376 (lit.) Flash point -45.5 ° C Spontaneous ignition point 201.66 ° C Water solubility is slightly soluble in water, only dissolving 0.9% by weight. Flammability limit in air is 1.7-28% (volume).