Reported in EPA TSCA Inventory.

The Octadecafluorooctane with the cas number 307-34-6, is also called (1) Perfluorooctane ; (2) n-Perfluorooctane ; (3) Octane, 1,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-octadecafluoro- ; (4) Octane, octadecafluoro- ; (5) Perfluorooctane . 

Properties of Octadecafluorooctane are: (1)ACD/LogP: 7.43 ; (2)# of Rule of 5 Violations: 1 ; (3)ACD/LogD (pH 5.5): 7.43 ; (4)ACD/LogD (pH 7.4): 7.43 ; (5)ACD/BCF (pH 5.5): 261792.84 ; (6)ACD/BCF (pH 7.4): 261792.84 ; (7)ACD/KOC (pH 5.5): 262874.69 ; (8)ACD/KOC (pH 7.4): 262874.69 ; (9)#H bond acceptors: 0 ; (10)#H bond donors: 0 ; (11)#Freely Rotating Bonds: 5 ; (12)Polar Surface Area: 0 Å² ; (13)Index of Refraction: 1.255 ; (14)Molar Refractivity: 41.78 cm³ ; (15)Molar Volume: 259 cm³ ; (16)Polarizability: 16.56 ×10^-24cm³ ; (17)Surface Tension: 12 dyne/cm ; (18)Density: 1.691 g/cm³ ; (19)Flash Point: 30.7 °C ; (20)Enthalpy of Vaporization: 33.38 kJ/mol ; (21)Boiling Point: 102.5 °C at 760 mmHg ; (22)Vapour Pressure: 38.8 mmHg at 25°C

The Octadecafluorooctane is also known as perfluorooctane, which is a perfluorinated derivative of the hydrocarbon octane. In high voltage electronics, it can be a good substitute for insulating oil. In addition to heat transfer applications, it has also been used as a breathable fluid in partial liquid ventilation. When you are using this chmical, please take cautions as follows: Octadecafluorooctane is quite irritating to eyes, respiratory system and skin. Avoiding contact with skin and eyes, please wear suitable protective clothing, gloves and eye/face protection. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.

The Octadecafluorooctane can be derived from 2-(1,1,2,3,3,3-hexafluoropropyl)oxepane in nickel tube at 440 °C, CoF3, CaF2 as reagent. Yield is 45 %.

                       
You can still convert the following datas into molecular structure :
1. FC(F)(C(F)(F)C(F)(F)F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F
2. InChI=1/C8F18/c9-1(10,3(13,14)5(17,18)7(21,22)23)2(11,12)4(15,16)6(19,20)8(24,25)26

The Octadecafluorooctane toxic data can be showed in the following sheet.