| Identification | More | [Name]
HAFNIUM CHLORIDE | [CAS]
13499-05-3 | [Synonyms]
HAFNIUM CHLORIDE
HAFNIUM(IV) CHLORIDE
HAFNIUM TETRACHLORIDE
(beta-4)-hafniumchloride(hfcl4
Hafnium chloride (HfCl4), (T-4)-
HfCl4
HAFNIUM CHLORIDE, SUBLIMED, 99.9%
HAFNIUM (IV) CHLORIDE ANHYDROUS 98+% (1-3% ZR)
HAFNIUM (IV) CHLORIDE SUBLIMED GRADE (99.9+%-HF, <1.0% ZR)
HAFNIUM (IV) CHLORIDE, SUBLIMED GRATE (99.9+%-HF, <0.5% ZR)
HAFNIUM CHLORIDE ANHYDROUS
Hafnium(IV) chloride,-80 mesh, 99%
Hafnium(IV)chloride,sublimedgrade(99.9+%-Hf,<0.05%Zr)
HAFNIUMANDITSCOMPOUNDS
(beta-4)-hafnium chloride
HAFNIUM(IV) CHLORIDE, ANHYDROUS (1-3% ZR)
Hafnium chloride, 98+% (metals basis excluding Zr), Zr 2.7%
Hafnium tetrachloride, sublimed: 99.95% (Hf+Zr)Cl4ü
Hafnium chloride, 99%, 80 mesh
Hafnium chloride(HfCl4) | [EINECS(EC#)]
236-826-5 | [Molecular Formula]
Cl4Hf | [MDL Number]
MFCD00011034 | [Molecular Weight]
320.3 | [MOL File]
13499-05-3.mol |
| Chemical Properties | Back Directory | [Appearance]
white fine crystalline powder | [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. | [Hydrolytic Sensitivity]
7: reacts slowly with moisture/water | [Sensitive ]
Moisture Sensitive | [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 | [InChIKey]
PDPJQWYGJJBYLF-UHFFFAOYSA-J | [CAS DataBase Reference]
13499-05-3(CAS DataBase Reference) | [EPA Substance Registry System]
Hafnium chloride (HfCl4), (T-4)- (13499-05-3) |
| Safety Data | Back Directory | [Hazard Codes ]
C | [Risk Statements ]
R34:Causes burns. | [Safety Statements ]
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 label where possible) . | [RIDADR ]
UN 3260 8/PG 2
| [WGK Germany ]
3
| [F ]
9-21 | [TSCA ]
Yes | [HazardClass ]
8 | [PackingGroup ]
II | [HS Code ]
28273985 |
| Hazard Information | Back Directory | [Chemical Properties]
white fine crystalline powder | [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; hydrolyzes in water. | [Uses]
Hafnium tetrachloride is an important intermediate in production of hafnium metal. It also is used to prepare many hafnium compounds. | [Preparation]
Hafnium tetrachloride 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]
Nonflammable | [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.
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