Molecular Structure:

Molecular Formula: F₃Sb
Molecular Weight: 178.7552
IUPAC Name: Antimony(3+) trifluoride
Synonyms of Antimony trifluoride (CAS NO.7783-56-4): Antimoine fluorure ; Antimoine fluorure [French] ; Antimonous fluoride ; Antimony fluoride ; Antimony trifluoride ; Antimony(III) fluoride (1:3) ; EINECS 232-009-2 ; HSDB 438 ; Stibine, trifluoro- ; Trifluoroantimony ; Trifluorostibine ; Antimony trifluoride, solid ; Antimony trifluoride, solid [NA1549] [Corrosive] ; Antimony trifluoride, solution ; Antimony trifluoride, solution [NA1549] [Corrosive] ; NA1549
CAS NO: 7783-56-4
Classification Code: Reportable Quantity (RQ) = 1000 lb
Melting point: 292 °C 
Enthalpy of Vaporization: 25.54 kJ/mol
Boiling Point: 19.5 °C at 760 mmHg
Vapour Pressure: 922 mmHg at 25°C

 Antimony trifluoride (CAS NO.7783-56-4) is used as a fluorination reagent in organic chemistry. It is often used in dyeing and pottery.

Reported in EPA TSCA Inventory. Antimony and its compounds are on the Community Right-To-Know List.

Hazard Codes of Antimony trifluoride (CAS NO.7783-56-4): T,N,C
Risk Statements: 23/24/25-51/53 
R23/24/25: Toxic by inhalation, in contact with skin and if swallowed. 
R51/53: Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
Safety Statements: 7-26-45-61 
S7: Keep container tightly closed. 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S45: In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 
S61: Avoid release to the environment. Refer to special instructions / safety data sheets.
RIDADR: UN 3260 8/PG 2
WGK Germany: 3
RTECS: CC5150000
F: 10
Hazard Note: Corrosive/Highly Toxic
HazardClass: 8
PackingGroup: III
Poison by subcutaneous route. Corrosive to skin and eyes. See also FLUORIDES and ANTIMONY COMPOUNDS. When heated to decomposition it emits very toxic fumes of F⁻ and Sb.

OSHA PEL: TWA 0.5 mg(Sb)/m³; TWA 2.5 mg(F)/m³
ACGIH TLV: TWA 2.5 mg(F)/m³; BEI: 3 mg/g creatinine of fluorides in urine prior to shift; 10 mg/g creatinine of fluorides in urine at end of shift; TWA 0.5 mg(Sb)/m³
NIOSH REL: TWA 0.5 mg(Sb)/m³
DOT Classification:  8; Label: Corrosive

Such as: When on the skin: first,should  flush skin with plenty of water immediatelyfor at least 15 minutes while removing contaminated clothing. Secondly,Get shoesmedical 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 : Do not induce vomiting.Wash mouth out with water,and get medical aid immediately.
In addition,  Antimony trifluoride (CAS NO.7783-56-4) can be stable under normal temperature and pressure conditions.It is not compatible with metals, strong acids, and you must not take it with incompatible materials and not be exposured to moist air or water.And also prevent it to broken down into hazardous decomposition products: hydrogen fluoride gas, antimony/antimony oxides.