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7783-71-3

Name TANTALUM PENTAFLUORIDE
CAS 7783-71-3
EINECS(EC#) 232-022-3
Molecular Formula F5Ta
MDL Number MFCD00042542
Molecular Weight 275.94
MOL File 7783-71-3.mol
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Chemical Properties

Appearance white crystalline powder
Melting point  96.8 °C
Boiling point  229.5 °C
density  4.74 g/mL at 25 °C(lit.)
Fp  230°C
solubility  soluble in H2O, ethyl ether; slightly soluble in CS2
form  Powder
color  off-white
Specific Gravity 4.740
Water Solubility  Decomposes in water forming tantalum oxyfluoride. Soluble in conc. and fuming HNO{3}Soluble in carbon disulfide, carbon tetrachloride and chloroform. Slightly soluble in acetic acid and ethanol.
Hydrolytic Sensitivity 7: reacts slowly with moisture/water
Sensitive  Moisture Sensitive
Merck  14,9055
Exposure limits ACGIH: TWA 2.5 mg/m3
NIOSH: IDLH 250 mg/m3
CAS DataBase Reference 7783-71-3(CAS DataBase Reference)
EPA Substance Registry System Tantalum fluoride (TaF5) (7783-71-3)

Safety Data

Hazard Codes  C
Risk Statements 
R34:Causes burns.
Safety Statements 
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S27:Take off immediately all contaminated clothing .
S28:After contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer) .
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 label where possible) .
RIDADR  UN 3260 8/PG 2
WGK Germany  3
RTECS  WW5775000
Hazard Note  Corrosive
TSCA  Yes
HazardClass  8
PackingGroup  II
HS Code  2826199090
Safety Profile
Poison by intravenous route. Corrosive. When heated to decomposition it emits toxic fumes of F-. See also TANTALUM and FLUORIDES.

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