Empirical Formula: C₃F₆O₄S
Molecular Weight: 246.0851 g/mol
Index of Refraction: 1.326
Density: 1.818 g/cm³
Flash Point: 14.7 °C
Enthalpy of Vaporization: 34 kJ/mol
Boiling Point: 100.8 °C at 760 mmHg
Vapour Pressure: 36.1 mmHg at 25 °C
Storage tempreture: Refrigerator
Appearance: Clear light yellow liquid
Structure of Trifluoroacetyl trifluoromethanesulfonate (CAS NO.68602-57-3):
                           

 Trifluoroacetyl trifluoromethanesulfonate (CAS NO.68602-57-3) hasn't been listed as a carcinogen by NTP, IARC, ACGIH, or CA Prop 65.

Violent reaction with water. When heated to decomposition Trifluoroacetyl trifluoromethanesulfonate (CAS NO.68602-57-3) emits toxic fumes of F⁻ and SO_x. See also FLUORIDES.
Hazard Codes: C
Risk Statements: 20/21/22-34 
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed. 
R34:Causes burns.
Safety Statements: 26-27-28-36/37/39-45 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S27:Take off immediately all contaminated clothing. 
S28:After contact with skin, wash immediately with plenty of soap-suds. 
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.)

 Trifluoroacetyl trifluoromethanesulfonate , its cas register number is 68602-57-3. It is hazardous,so the first aid measures and others should be known. Such as: When on the skin: first,should flush skin with plenty of water immediately for at least 15 minutes while removing contaminated clothing. Secondly, get medical aid. Or in the eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Then get medical aid soon. While, it's inhaled: Remove from exposure and move to fresh air immediately.Give artificial respiration while not breathing. When breathing is difficult, give oxygen. And as soon as to get medical aid. Then you have the ingesting of the product : Wash mouth out with water, and get medical aid immediately.
In addition, Trifluoroacetyl trifluoromethanesulfonate (CAS NO.68602-57-3) could be stable under normal temperatures and pressures. It is not compatible with strong oxidizing agents, strong reducing agents, strong bases, alcohols, and you must not take it with incompatible materials. It should be exposuref to moist air or water. And also prevent it to broken down into hazardous decomposition products: Carbon monoxide, oxides of sulfur, carbon dioxide, hydrogen fluoride gas.