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n-Heptane (C7H16) is a colorless liquid that is insoluble in water. It is obtained by fractional distillation of petroleum. Heptane is not only flammable, but also moderately toxic if inhaled. It is used as a solvent, as an anaesthetic and in organic synthesis.

Molecular weight:100.198Critical temperature: 540.61 K
Melting point: 182.6 KCritical pressure: 2.736 MPa
Normal boiling point: 371.6 KCritical density: 234.1 kg/m3

See Table 1 below.

Table 1. Heptane: Values of thermophysical properties of the saturated liquid and vapor

Note. From Beaton, C. F. and Hewitt, G. F., Physical Property Data for the Design Engineer, Hemisphere Publishing Corp., New York, 1989, with permission.

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