IUPAC Name: 1-(Chloromethyl)-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane ditetrafluoroborate 
Following is the structure of 1-Chloromethyl-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane bis(tetrafluoroborate) (CAS NO.140681-55-6):
                 
Empirical Formula: C₇H₁₄B₂ClF₉N₂
Molecular Weight: 354.2601 g/mol
Melting point: 260 °C(lit.)
storage temp.: 2-8°C
Water Solubility: soluble
Sensitive: Moisture Sensitive 
Appearance of 1-Chloromethyl-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane bis(tetrafluoroborate) (CAS NO.140681-55-6): White powder
Canonical SMILES: [B-](F)(F)(F)F.[B-](F)(F)(F)F.C1C[N+]2(CC[N+]1(CC2)CCl)F
InChI: InChI=1S/C7H14ClFN2.2BF4/c8-7-10-1-4-11(9,5-2-10)6-3-10;2*2-1(3,4)5/h1-7H2;;/q+2;2*-1
InChIKey: TXRPHPUGYLSHCX-UHFFFAOYSA-N

 1-Chloromethyl-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane bis(tetrafluoroborate) (CAS NO.140681-55-6) hasn't been listed as a carcinogen by ACGIH, IARC, NTP, or CA Prop 65. And the toxicological properties have not been fully investigated.

Hazard Codes: Xn,O,F,Xi
Risk Statements: 22-36/37/38-41 
R22:Harmful if swallowed. 
R36/37/38:Irritating to eyes, respiratory system and skin. 
R41:Risk of serious damage to the eyes.
Safety Statements: 26-36/37/39 
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.
RIDADR: UN 3088 4.2/PG 2
WGK Germany: 2
Hazard Note: Oxidising Agent
TSCA: T
HazardClass :8
PackingGroup: II

 1-Chloromethyl-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane bis(tetrafluoroborate) , its cas register number is 140681-55-6. It also can be called N-Chloromethyl-N'-fluorotriethylenediammonium bis(tetrafluoroborate); Selectfluor fluorinating reagent ; 1,4-Diazoniabicyclo(2.2.2)octane, 1-(chloromethyl)-4-fluoro-, tetrafluoroborate(1-) (1:2) ; and 1,4-Diazoniabicyclo(2.2.2)octane, 1-(chloromethyl)-4-fluoro-, bis(tetrafluoroborate(1-)) . Its classification code is TSCA Flag P [A commenced PMN (Premanufacture Notice) substance].
 1-Chloromethyl-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane bis(tetrafluoroborate) (CAS NO.140681-55-6) is Thermally unstable, Moisture sensitive and Heat sensitive. It should avoid the condition like incompatible materials, ignition sources, exposure to moist air or water, flammable materials, temperatures above 30°C. It is not compatible with strong oxidizing agents, reducing agents, strong acids, bases. And also prevent it to broken down into hazardous decomposition products: hydrogen chloride, nitrogen oxides, carbon monoxide, carbon dioxide, hydrogen fluoride gas, boron trifluoride. However, its hazardous polymerization will not occur.