Name | Tantalum(V) chloride |
Synonyms | TaCl5 Tantalum(Ⅴ)chloride Tantalum(V) chloride Tantalum (V) Chloride Tantalum pentachloride Tantalum chloride (TaCl5) Tantalumchlorideanhydrous Tantalumchloridehighpurity tantalum(5+) pentachloride tantalum(+2) cation pentachloride TantalumVchlorideresublimedmetalsbasisyellowpowd AMMONIUM CARBONATE EXTRA PURE, N. F., PH . FRANC. |
CAS | 7721-01-9 |
EINECS | 231-755-6 |
InChI | InChI=1/5ClH.Ta/h5*1H;/q;;;;;+2/p-5 |
InChIKey | OEIMLTQPLAGXMX-UHFFFAOYSA-I |
Molecular Formula | Cl5Ta |
Molar Mass | 358.21 |
Density | 3.68g/mLat 25°C(lit.) |
Melting Point | 221 °C |
Boling Point | 242 °C |
Flash Point | 242°C |
Water Solubility | Soluble in water (reacts). Also soluble in ethanol, ether and carbon tetrachloride. |
Solubility | Soluble in ether, carbon tetrachloride, sulfuric acid and potassium hydroxide. Slightly soluble in ethanol. |
Vapor Presure | 69.9hPa at 169.3℃ |
Appearance | powder |
Specific Gravity | 3.68 |
Color | White to pale yellow |
Merck | 14,9054 |
Storage Condition | no restrictions. |
Sensitive | Moisture Sensitive |
Physical and Chemical Properties | Yellow glassy crystals or powder. |
Use | Used as a chlorinating agent for organic compounds, chemical intermediates and for the preparation of tantalum |
Hazard Symbols | C - Corrosive |
Risk Codes | R22 - Harmful if swallowed R34 - Causes burns |
Safety Description | S26 - 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.) |
UN IDs | UN 3260 8/PG 2 |
WGK Germany | 3 |
RTECS | WW5600000 |
FLUKA BRAND F CODES | 3-10-21 |
TSCA | Yes |
HS Code | 28273990 |
Hazard Class | 8 |
Packing Group | III |
Toxicity | LD50 in rats (mg/kg): 75 i.p.; 1900 orally (Cochran) |
EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
tantalum pentachloride | tantalum pentachloride, chemical formula tacl5. Molecular weight 358.21. White or yellow crystalline powder. The melting point is 216 ℃, the boiling point is 242 ℃, and the relative density is 3.6827. Can be sublimated in carbon dioxide or dry chlorine. Soluble in ethanol, chloroform, carbon tetrachloride and potassium hydroxide, insoluble in sulfuric acid. Chemically less stable, it decomposes in humid air or water and produces tantalic acid. Heating in a hydrogen stream to a temperature above 600 °c results in the evolution of hydrogen chloride gas and the formation of tantalum metal. Should be sealed and stored. |
crystal structure | TaCl5 is a monoclinic crystal, space group C2/m. Ten chlorine atoms are at the positions of the vertices of the two octahedron. Two tantalum atoms are in the middle of the octahedron, which is formed by the chlorine connection of two bridging ligands. The dimer structure remains in the non-complexing solvent and remains largely in the molten state. However, the gaseous TaCl5 is a monomer. The shape of this monomer is a triangular double cone, just like pcl5. |
Application | tantalum pentachloride is in the form of white or yellow crystals and is used as an intermediate for making optical glass, tantalum metal and tantalum carbide. |
preparation | tantalum pentachloride may be formed by a direct combination of tantalum and chlorine gas between 170 and 250°C. This reaction can also be carried out with HCl, but at 400°C. 2 Ta 5 Cl2 → 2 TaCl52 Ta 10 HCl → 2 TaCl5 5 H2 tantalum pentachloride can also be obtained by reacting tantalum pentoxide with sulfoxide chloride at 240°C. Ta2O5 5 SOCl2 → 2 TaCl5 5SO2 tantalum pentachloride is commercially available, but there will be a small amount of tantalum oxychloride (TaOCl3) in the sample. This is the hydrolysis of tantalum pentachloride. |
Application | used as chlorinating agent of organic compounds, chemical intermediates and for the preparation of tantalum and so on |
category | corrosive article |
toxicity grade | poisoning |
Acute toxicity | oral-rat LD50: 1900 mg/kg |
flammability hazard characteristics | The pore forming agent is flammable in case of H; Toxic hydrogen cyanide gas is emitted in case of cyanide; thermally decomposed toxic chloride and tantalum-containing fumes |
storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; It is stored separately from oxidant, cyanide, H pore forming agent and alkali. |
fire extinguishing agent | sand, water mist, foam |