Hafnium(IV) chloride

CAS No.：13499-05-3

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Hafnium(IV) chloride Basic information

Product Name:	Hafnium(IV) chloride
Synonyms:	Hafnium Chloride 98+%;HafniuM(IV) chloride, -80 Mesh, 99% 25GR;HafniuM(IV) chloride 98%;HafniuM(IV) chloride purified by subliMation, 99.9% trace Metals basis;Hafnium(IV) chloride, 99.9% trace metals basis excluding Zr;Hafnium(IV) chloride, 98% trace metals basis excluding Zr;HAFNIUM(IV) CHLORIDE;HAFNIUM CHLORIDE
CAS:	13499-05-3
MF:	Cl4Hf
MW:	320.3
EINECS:	236-826-5
Product Categories:	Crystal Grade Inorganics;HafniumMetal and Ceramic Science;straight chain compounds;Hafnium Salts;Metal and Ceramic Science;Salts;metal halide
Mol File:	13499-05-3.mol

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.
Hydrolytic Sensitivity	7: reacts slowly with moisture/water
Sensitive	Moisture Sensitive
Merck	14,4588
Exposure limits	ACGIH: TWA 0.5 mg/m3NIOSH: 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 Information

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	Yes
HazardClass	8
PackingGroup	II
HS Code	28273985

MSDS Information

Provider	Language
SigmaAldrich	English
ACROS	English
ALFA	English

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.
Flammability and Explosibility	Nonflammable
Solubility in organics	Soluble in methanol, acetone, reacts strongly with water, highly hygroscopic, hydrolyzes in water.

Hafnium(IV) chloride Preparation Products And Raw materials

Raw materials	Chlorine-->Carbon-->Disulfur dichloride-->Thionyl chloride
Preparation Products	PHOSGENE-->BIS(CYCLOPENTADIENYL)HAFNIUM DICHLORIDE-->1,5-Dibromo-2,4-dimethylbenzene

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