Molecular formula : C7H16
MW : 100.21
CAS No. :142-82-5
nature : a colorless liquid. -90.7 ° C melting point, boiling point of 98.4 ° C and relative density of 0.684 (20 / 4 ° C), the refractive index 1.3855 (25 ° C). -1 ° C flashpoint. Soluble alcohol, chloroform, ethyl ether and benzene, do not dissolve in water.
Preparation : platinum restructuring raffinate oil (93-102 ° C) fractions CKS heptane content of over 57%, with 5A zeolite-based gas adsorption of n-alkanes, and then use the steam desorption, isolated n-alkanes. Nickel by catalytic hydrogenation, which is a small structure into olefin saturation of n-alkanes, iodine value to 0.1 g iodine / 100g for the following qualified. The final distillation purity derived 99.9% of the n-heptane. Industrial Purification heptane is also available concentrated sulfuric acid washing, methanol azeotropic distillation methods.
purposes : reagents for the analysis, the gasoline engine knock test standard and chromatographic analysis reference material, solvents. The goods can stimulate the respiratory tract, a high concentration of anesthetic effects. Flammable, in the air to form a mixture explosion limit the concentration of 1.0-6.0% (volume).
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