Molecular structure of Perfluorooctylsulfonyl fluoride (CAS NO.307-35-7) is:

Product Name: Perfluorooctylsulfonyl fluoride
CAS Registry Number: 307-35-7
IUPAC Name: 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluorooctane-1-sulfonylfluoride
Molecular Weight: 502.120658 [g/mol]
Molecular Formula: C₈F₁₈O₂S
XLogP3-AA: 6
H-Bond Donor: 0
H-Bond Acceptor: 20
EINECS: 206-200-6
Melting Point: -1 °C 
Refractive index: 1.299-1.302
Surface Tension: 16.6 dyne/cm
Density: 1.792 g/cm³
Flash Point: 47 °C
Enthalpy of Vaporization: 37.48 kJ/mol 
Sensitive Moisture: Sensitive
Boiling Point: 154.1 °C at 760 mmHg
Vapour Pressure: 4.14 mmHg at 25°C 
Product Categories: Fluorous Chemistry;Fluorous Compounds;Synthetic Organic Chemistry

Safty information about Perfluorooctylsulfonyl fluoride (CAS NO.307-35-7) is:
Hazard Codes: C
Risk Statements: 34 
R34:Causes burns.
Safety Statements: 26-36/37/39-45-25 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection. 
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 
S25:Avoid contact with eyes.
RIDADR: UN 3265 8/PG 2
WGK Germany: 3
F: 10-21
Hazard Note: Corrosive
HazardClass: 8
PackingGroup: II

 Perfluorooctylsulfonyl fluoride , its cas register number is 307-35-7. It also can be called 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-Heptadecafluoro-1-octanesulfonyl fluoride ; 1-Octanesulfonyl fluoride,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluoro- ; N-Perfluorooctanesulfonyl fluoride ; Heptadecafluorooctanesulphonyl fluoride .It is a clear colourless liquid.