Basic information
- Name:
Tantalum chloride(TaCl5)
- Superlist Name:
- Tantalum chloride
- CAS No.:
7721-01-9
- Molecular Structure:
- Formula:
- Cl5Ta
- Molecular Weight:
- 358.20
- Synonyms:
- Pentachlorotantalum;Tantalum chloride; Tantalum pentachloride; Tantalum pentachloride (TaCl5);Tantalum(V) chloride
- Density:
- 3.68(27℃)
- Melting Point:
- 216℃
- Boiling Point:
- 242℃
- Flash Point:
- °C
- Hazard Symbols:
C- Risk Codes:
- R22;R34;
- Safety Description:
- Poison by intraperitoneal route. Moderately toxic by ingestion. When heated to decomposition it emits toxic fumes of Cl−. Details
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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 
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.