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Tantalum chloride

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Name Tantalum chloride EINECS
CAS No. 7721-01-9 Density 3.68(27℃)
Solubility Melting Point 216℃
Formula Cl5Ta Boiling Point 242℃
Molecular Weight 358.20 Flash Point °C
Transport Information Appearance
Safety Poison by intraperitoneal route. Moderately toxic by ingestion. When heated to decomposition it emits toxic fumes of Cl. Risk Codes R22;R34;
Molecular Structure Molecular Structure of 7721-01-9 (Tantalum chloride(TaCl5)) Hazard Symbols C
Synonyms

Pentachlorotantalum;Tantalum chloride; Tantalum pentachloride; Tantalum pentachloride (TaCl5);Tantalum(V) chloride

 

Chemistry

Molecular Structure of Tantalum chloride (CAS NO.7721-01-9):

EINECS: 231-755-6
IUPAC Name: Pentachlorotantalum 
Molecular Formula: Cl5Ta
Molecular Weight:  358.212900 g/mol
H-Bond Donor: 0
H-Bond Acceptor: 0
Canonical SMILES: Cl[Ta](Cl)(Cl)(Cl)Cl
InChI: InChI=1S/5ClH.Ta/h5*1H;/q;;;;;+5/p-5
InChIKey: OEIMLTQPLAGXMX-UHFFFAOYSA-I
Density: 3.68 g/mL at 25 °C(lit.)
Flash Point: 242 °C
Enthalpy of Vaporization: 16.15 kJ/mol
Boiling Point: 242 °C
Vapour Pressure: 33900 mmHg at 25 °C
Melting Point: 221 °C
Sensitive: Moisture

Production

  Tantalum chloride is prepared by heating tantalum metal in chlorine, then purified by sublimation to give white needles. Samples are often contaminated with tantalum(V) oxychloride .

Toxicity Data With Reference

1.    

orl-rat LD50:1900 mg/kg

    AIHOAX    Archives of Industrial Hygiene and Occupational Medicine. 1 (1950),637.
2.    

ipr-rat LD50:75 mg/kg

    AIHOAX    Archives of Industrial Hygiene and Occupational Medicine. 1 (1950),637.

Consensus Reports

Reported in EPA TSCA Inventory.

Safety Profile

Safety Information of Tantalum chloride (CAS NO.7721-01-9):
Hazard Codes: C Corrosive
Risk Statements: 22-34
R22:Harmful if swallowed
R34:Causes burns
Safety Statements: 26-36/37/39-45S
26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
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: 3
RTECS: WW5600000
HazardClass: 8
PackingGroup: III
F: 3-10-21
Poison by intraperitoneal route. Moderately toxic by ingestion. When heated to decomposition it emits toxic fumes of Cl.

Specification

  Tantalum chloride with cas registry number of 7721-01-9 is white to pale yellow crystals, also known as Tantalum pentachloride ; Tantalum chloride (TaCl5) ; Tantalumchlorideanhydrous . It is less soluble in cyclohexane and carbon tetrachloride than in the aromatic hydrocarbons. The solubility increases to a slightly for the following series: benzene< toluene< m-xylene< mesitylene, as reflected in the deepening of colour of the solutions from pale yellow to orange. Tantalum chloride is strongly electrophillic as a Friedel-Crafts type catalyst and can form adducts with a variety of ligands such as [TaCl5(OPCl3)]. It can product many chemicals in chloride displacement reactions, and ammonolysis and amide-forming reactions such as TaCl5 + 5LiOMe → Ta(OMe)4Cl + 4LiCl.

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