Arsenic trifluoride, trifluoroarsane
3D model (JSmol)
CompTox Dashboard (EPA)
|Molar mass||131.9168 g/mol|
|Appearance||colorless oily liquid|
|Density||2.666 g/cm3 (0 °C)|
|Melting point||−8.5 °C (16.7 °F; 264.6 K)|
|Boiling point||60.4 °C (140.7 °F; 333.5 K)|
|Solubility||soluble in alcohol, ether, benzene and ammonia solution|
|Occupational safety and health (OHS/OSH):|
|H301, H311, H331|
|P261, P264, P270, P271, P280, P301+P310, P302+P352, P304+P340, P311, P312, P321, P322, P330, P361, P363, P403+P233, P405, P501|
|NIOSH (US health exposure limits):|
|[1910.1018] TWA 0.010 mg/m3|
|Ca C 0.002 mg/m3 [15-minute]|
IDLH (Immediate danger)
|Ca [5 mg/m3 (as As)]|
Std enthalpy of
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|(what is ?)|
Arsenic trifluoride is used as a fluorinating agent for the conversion of non-metal chlorides to fluorides, in this respect it is less reactive than SbF3.
Salts containing AsF4− anion can be prepared for example CsAsF4. the potassium salt KAs2F7 prepared from KF and AsF3 contains AsF4− and AsF3 molecules with evidence of interaction between the AsF3 molecule and the anion.
AsF3 reacts with SbF5. The product obtained could be described as the ionic compound AsF2+ SbF6−. However, the authors conclude the formed product cannot be viewed only as an ionic compound nor entirely as the neutral adduct AsF3SbF5. The crystal structure displays characteristics of both an ionic pair, and a neutral adduct, taking the middle ground in between both models.