Cycloheptane, also known as Suberane,[1] is an organic compound, which belongs to the group of cycloalkanes.

[4] According to the Antoine equation, the vapor pressure function is given by log10(P) = A−(B/(T+C)) (P in bar, T in K) with A = 3,97710, B = 1330,402 and C = −56,946 in the temperature range from 341.3 K to 432.2 K.[4] In the solid phase, cycloheptane occurs in four polymorphic forms.

[4][3] Cycloheptane can be thermally rearranged to methylcyclohexane in the presence of aluminum trichloride.

An irritating effect on the eyes and respiratory tract is mentioned in the literature.

The toxic effect is more comparable to that of methylcyclohexane, which only slightly irritates the mucous membranes.