The molecular formula of Potassium hexafluorophosphate(17084-13-8) is F₆KP and its formula weight is 184.06.
The density of Potassium hexafluorophosphate(17084-13-8) is 2.75 g/mL at 25 °C(lit.) and it has a melting point of  575 °C(lit.). Its water solubility is 93 g/L (25  °C).
The chemical synonyms of Potassium hexafluorophosphate(17084-13-8) are hexafluoro-phosphate(1-potassium;Phosphate(1-),hexafluoro-,potassium;POTASSIUM HEXAFLUOROPHOSPHATE;POTASSIUM HEXAFLUOROPHOSPHATE (V);POTASSIUM HEXFLUOROPHOSPHATE;POTASSIUM HEXAFLUOROPHOSPHATE, 99.999%;Potassium fluorophosphate;Potassium hexafluorophosphate, extra pure, 99%
The molecular structure of Potassium hexafluorophosphate (17084-13-8):

 

RTECS#: CAS# 17084-13-8: None listed
LD50/LC50: RTECS: Not available. 
Carcinogenicity: Potassium hexafluorophosphate - Not listed as a carcinogen by ACGIH, IARC, NTP, or CA Prop 65.
Other: The toxicological properties have not been fully investigated.

Hazard Codes:  C,Xi
Risk Statements:  34-20/21/22 
R34:Causes burns. 
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed.
Safety Statements:  26-27-36/37/39-45 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S27:Take off immediately all contaminated clothing. 
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.)
RIDADR:  UN 3260 8/PG 2
WGK Germany:  1
Hazard Note:  Irritant
TSCA:  T
HazardClass:  8
PackingGroup:  III

Chemical Stability: Stable under normal temperatures and pressures. Hygroscopic: absorbs moisture or water from the air. 
Conditions to Avoid: Incompatible materials, exposure to moist air or water. 
Incompatibilities with Other Materials Strong oxidizing agents, strong acids. 
Hazardous Decomposition Products Phosphine, carbon monoxide, oxides of phosphorus, carbon dioxide, hydrogen fluoride gas. 
Hazardous Polymerization Has not been reported.