Chemistry informtion about Choline Salicylate (CAS NO.2016-36-6) is:
IUPAC Name: 2-Hydroxybenzoate; 2-Hydroxyethyl(Trimethyl)Azanium
Synonyms: (2-Hydroxyethyl)Trimethylammoniumsalicylate ; 2-Hydroxy-N,N,N-Trimethylethanaminiumsaltwith2-Hydroxybenzoicacid(1:1) ; 2-Hydroxy-N,N,N-Trimethyl-Ethanaminiusaltwith2-Hydroxybenzoicacid(1: ; 2-Hydroxy-N,N,N-Trimethyl-Ethanaminiusaltwith2-Hydroxybenzoicacid(1:1) ; Actasal ; Arret ; Arthropan ; Artrobione
MF: C₁₂H₁₉NO₄
MW: 241.28
EINECS: 217-948-8 
Flash Point: 144.5 °C
Boiling Point: 336.3 °C at 760 mmHg
Vapour Pressure: 4.45E-05 mmHg at 25°C 
Enthalpy of Vaporization: 61.16 kJ/mol
Following is the molecular structure of Choline Salicylate (CAS NO.2016-36-6) is:

Choline Salicylate (CAS NO.2016-36-6) was used for temporary relief of pain of rheumatoid arthritis, rheumatic fever, osteoarthritis, and other conditions for which oral salicylates are recommended; useful in patients in which there is difficulty in administering doses in a tablet or capsule dosage form, because of the liquid dosage form.

Reported in EPA TSCA Inventory.

Moderately toxic by ingestion, intraperitoneal, and subcutaneous routes. An analgesic and antipyretic. When heated to decomposition it emits toxic fumes of NO_x and NH₃. See also CHOLINE.
Safty information about Choline Salicylate (CAS NO.2016-36-6) :
WGK Germany: 2
RTECS: GA6475000
F:
F 3: Hygroscopic. 
F 10 Keep under argon.