TANTALUM PENTAFLUORIDE Property

Melting point:

96.8 °C

Boiling point:

229.5 °C

Density 

4.74 g/mL at 25 °C(lit.)

Flash point:

230°C

solubility 

soluble in H2O, ethyl ether; slightly soluble in CS2

form 

Powder

Specific Gravity

4.740

color 

off-white

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.

Sensitive 

Moisture Sensitive

Hydrolytic Sensitivity

7: reacts slowly with moisture/water

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

Hazard Codes 

C

Risk Statements 

34

Safety Statements 

26-27-28-36/37/39-45

RIDADR 

UN 3260 8/PG 2

WGK Germany 

3

RTECS 

WW5775000

Hazard Note 

Corrosive

TSCA 

Yes

HazardClass 

8

PackingGroup 

II

HS Code 

2826199090

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H314Causes severe skin burns and eye damage

Precautionary statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P330+P331IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

TANTALUM PENTAFLUORIDE Chemical Properties,Usage,Production

Chemical Properties

white crystalline powder

Uses

Tantalum fluoride is a catalyst used to speed up organic chemical reactions.

Uses

Tantalum pentafluoride, TaF5, is used in petrochemistry as an isomerization and alkyalation catalyst. In addition, the fluoride can be utilized as a fluorination catalyst for the production of fluorinated hydrocarbons. The pentafluoride is produced by the direct fluorination of tantalum metal or by reacting anhydrous hydrogen fluoride with the corresponding pentoxide or oxychloride in the presence of a suitable dehydrating agent. The ability of TaF5 to act as a fluoride ion acceptor in anhydrous HF has been used in the preparation of salts of the AsH4, H3S, and PH4 ions. The oxyfluorides TaOF3 and TaO2F do not find any industrial application.

Uses

Friedel-Crafts catalyst.

Safety Profile

Poison by intravenous route. Corrosive. When heated to decomposition it emits toxic fumes of F-. See also TANTALUM and FLUORIDES.