- Hafnium(IV) chloride
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- $1.00
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2026-09-04
- CAS:13499-05-3
- Min. Order: 1kg
- Purity: 99.9
- Supply Ability: 1000kg
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| | Hafnium(IV) chloride Basic information |
| | Hafnium(IV) chloride Chemical Properties |
| Melting point | 432 °C (lit.) | | Boiling point | 315.47°C (estimate) | | density | 1.89 g/cm3 | | vapor pressure | 1 mm Hg ( 190 °C) | | storage temp. | Inert atmosphere,Room Temperature | | solubility | Soluble in methanol and acetone. | | form | Powder | | color | White | | Water Solubility | Soluble in water, methanol and acetone. | | Specific Heat Capacity | Cp(crystal): 0.38 J/(g·K), at 25℃ | | Sensitive | Moisture Sensitive | | Hydrolytic Sensitivity | 7: reacts slowly with moisture/water | | crystal system | Monoclinic | | Merck | 14,4588 | | Space group | P2/c | | Lattice constant | | a/nm | b/nm | c/nm | α/o | β/o | γ/o | V/nm3 | | 0.6327 | 0.7377 | 0.62 | 90 | 109.05 | 90 | 0.2735 |
| | Exposure limits | ACGIH: TWA 0.5 mg/m3
NIOSH: IDLH 50 mg/m3; TWA 0.5 mg/m3 | | InChI | 1S/4ClH.Hf/h4*1H;/q;;;;+4/p-4 | | InChIKey | PDPJQWYGJJBYLF-UHFFFAOYSA-J | | SMILES | Cl[Hf](Cl)(Cl)Cl | | CAS DataBase Reference | 13499-05-3(CAS DataBase Reference) | | EPA Substance Registry System | Hafnium chloride (HfCl4), (T-4)- (13499-05-3) |
| Hazard Codes | C | | Risk Statements | 34 | | Safety Statements | 26-36/37/39-45 | | RIDADR | UN 3260 8/PG 2 | | WGK Germany | 3 | | F | 9-21 | | TSCA | TSCA listed | | HazardClass | 8 | | PackingGroup | II | | HS Code | 28273985 | | Storage Class | 8B - Non-combustible corrosive hazardous materials | | Hazard Classifications | Eye Dam. 1
Met. Corr. 1
Skin Corr. 1B |
| | Hafnium(IV) chloride Usage And Synthesis |
| Chemical Properties | Hafnium(IV) chloride is the inorganic compound with the formula HfCl4. This colourless solid is the precursor to most hafnium organometallic compounds. It has a variety of highly specialized applications, mainly in materials science and as a catalyst. | | Physical properties | White monoclinic crystal; sublimes at 317°C; melts at 432°C at 33 atm (triple point); critical temperature 452.5°C; critical pressure 53.49 atm; critical volume 314 cm3/mol.
 | | Uses | Hafnium tetrachloride is an important intermediate in production of hafnium metal. It also is used to prepare many hafnium compounds. | | Uses | Hafnium chloride tetrahydrofuran complex is an efficient catalyst for the Diels-Alder cycloadditions, Ziegler-Natta polymerization of alkenes. It is used as control rods in nuclear reactors and in manufacture of light bulb filaments. | | Uses | Hafnium (IV) chloride can be used to catalyze the direct ester condensation of carboxylic acids with alcohols effectively. | | Preparation | Hafnium(IV) chloride can be prepared
(i) by chlorination of hafnium dioxide in the presence of carbon:
HfO2 + 2Cl2 + C → HfCl4 + 2CO
It also may be prepared by several other methods, such as
(ii) reaction of carbon tetrachloride with hafnium dioxide above 450°C;
(iii) heating a mixture of hafnium dioxide and carbon above 700°C;
and (iv) reaction of chlorine with hafnium at elevated temperatures. | | Reactions | Hafnium(IV) chloride hydrolyzes, evolving hydrogen chloride:
HfCl4 + H2O→ HfOCl2+ 2 HCl
Aged samples thus often are contaminated with oxychlorides, which are also colourless.
THF forms a monomeric 2:1 complex:
HfCl4+ 2 OC4H8→HfCl4(OC4H8)2 | | Flammability and Explosibility | Non flammable | | Solubility in organics | Soluble in methanol, acetone, reacts strongly with water, highly hygroscopic, hydrolyzes in water. | | Structure and conformation | This group 4 halide contains hafnium in the +4 oxidation state. Solid Hafnium(IV) chloride is a polymer with octahedral Hf centers. Of the six chloride ligands surrounding each Hf centre, two chloride ligands are terminal and four bridge to another Hf centre. |
| | Hafnium(IV) chloride Preparation Products And Raw materials |
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