The Propane,1,1,1,2,2,3-hexafluoro-, with the CAS registry number 677-56-5, is also known as Propane, hexafluoro-. It belongs to the product category of Refrigerants. This chemical's molecular formula is C₃H₂F₆ and formula weight is 152.03. What's more, its IUPAC name is 1,1,1,2,2,3-hexafluoropropane. You should not breathe gas/fumes/vapour/spray (appropriate wording to be specified by the manufacturer). 

Physical properties of Propane,1,1,1,2,2,3-hexafluoro- are: (1)ACD/LogP: 1.40; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 1.4; (4)ACD/BCF (pH 5.5): 6.85; (5)ACD/KOC (pH 5.5): 138.05; (6)#Freely Rotating Bonds: 1; (7)Index of Refraction: 1.24; (8)Molar Refractivity: 16.86 cm³; (9)Molar Volume: 110.8 cm³; (10)Polarizability: 6.68×10^-24 cm³; (11)Surface Tension: 10.3 dyne/cm; (12)Density: 1.371 g/cm³; (13)Enthalpy of Vaporization: 23.39 kJ/mol; (14)Vapour Pressure: 2240 mmHg at 25°C.

Preparation: this chemical can be prepared by tetrafluoroethylene, difluoromethane at the temperature of 50 - 80 °C. This reaction will need reagent SbF₅ with the reaction time of 28 hours. The yield is about 92%.

You can still convert the following datas into molecular structure:
(1)Canonical SMILES: C(C(C(F)(F)F)(F)F)F
(2)InChI: InChI=1S/C3H2F6/c4-1-2(5,6)3(7,8)9/h1H2
(3)InChIKey: SUAMPXQALWYDBK-UHFFFAOYSA-N