Hafnium chloride/HfCl4/cas 13499-05-3
Product Name: HAFNIUM CHLORIDE
CAS: 13499-05-3
MF: Cl4Hf
MW: 320.3
EINECS: 236-826-5
Melting point：319 °C
Boiling point：315.47°C (estimate)
density ：1.89 g/cm3
vapor pressure：1 mm Hg ( 190 °C)
solubility：Soluble in methanol and acetone.
form：Powder
color：White
Hafnium(IV) chloride is an important intermediate in production of hafnium metal. It also is used to prepare many hafnium compounds.
In the field of materials science, Hafnium(IV) chloride is a key precursor material in the preparation of hafnium based alloys. Hafnium based alloys are widely used in the hot end components of aerospace engines, such as turbine blades and combustion chambers, due to their excellent high temperature resistance and corrosion resistance. They can withstand mechanical stress and chemical erosion in extreme high temperature environments, ensuring the reliable operation of aircraft.
Electronic industry: It is an important raw material for manufacturing high dielectric constant gate materials. With the continuous development of semiconductor devices towards miniaturization, the performance requirements for gate materials are becoming increasingly stringent. Materials synthesized with hafnium tetrachloride can effectively improve the electrical performance of transistors, reduce leakage, help chips achieve higher computing speed and lower power consumption, and promote the upgrading of electronic products.
Ceramic manufacturing: used to prepare special ceramics containing hafnium element, which have unique mechanical strength, hardness, and high-temperature impact resistance. They have excellent performance in cutting tools, molds, and industrial kiln linings, extending their service life and improving production efficiency.
Hafnium Oxide Precursor: HfCl₄ is commonly used as a precursor to produce hafnium oxide (HfO₂), which has a variety of applications including high-k dielectrics in semiconductor devices.
Catalyst in organic synthesis: Hafnium chloride can be used as a catalyst in certain organic reactions, especially in the polymerization process.
Chemical Vapor Deposition (CVD): HfCl₄ is used in the chemical vapor deposition process to deposit hafnium-containing films, which are important for the manufacture of microelectronics and thin film technology.
Nuclear Applications: Due to its neutron absorbing properties, hafnium and its compounds (including hafnium chloride) are used in nuclear reactors and control rods.
Research and Development: Hafnium chloride is also used in various research applications, particularly in the fields of materials science and chemistry to study hafnium compounds and their properties.
Stored in a ventilated and dry warehouse.
Hafnium chloride (HfCl₄) should be stored carefully to maintain its stability and prevent degradation. Here are some guidelines for storing Hafnium chloride:
Container: Store Hafnium Chloride in airtight containers made of suitable materials, such as glass or certain plastics, to prevent moisture intrusion. Avoid using metal containers as Hafnium Chloride reacts with metals.
Environment: Store containers in a cool, dry place away from direct sunlight and heat. Because Hafnium Chloride is hygroscopic, it is important to minimize exposure to moisture.
Inert Atmosphere: If possible, store hafnium chloride under an inert atmosphere (such as nitrogen or argon) to prevent hydrolysis and reaction with moisture in the air.
Label: Clearly label containers with chemical name, hazard information, and receipt date to ensure proper handling and safety.
Safety Precautions: Please follow all relevant hazardous material safety guidelines and regulations when storing and handling Hafnium Chloride, including the use of appropriate personal protective equipment (PPE).
Yes, Hafnium Chloride (HfCl₄) is considered hazardous. Here are some key points about its hazards:
1. Corrosive: Hafnium chloride is corrosive to the skin, eyes and respiratory tract. Contact can cause irritation and burns.
2. Toxicity: Inhalation of Hafnium Chloride dust or vapor can be harmful and may cause respiratory problems. Be sure to avoid breathing any dust or fumes.
3. Reactivity: Hafnium chloride is hygroscopic and can react with moisture in the air to release hydrochloric acid, which is also dangerous.
4. Environmental Impact: Hafnium chloride is harmful to aquatic life and should be handled with care to prevent environmental contamination.
Because of these hazards, proper safety protocols must be followed when handling hafnium chloride, including using appropriate personal protective equipment (PPE), working in well-ventilated areas, and complying with all relevant safety guidelines and regulations.
Packaging requirements: Hafnium tetrachloride must be packaged in containers with good sealing performance, commonly metal drums or glass bottles lined with plastic, to ensure that there will be no leakage during transportation. Clear chemical identification labels should be affixed outside the packaging, indicating key information such as "hafnium tetrachloride", "corrosive", "toxic", as well as the United Nations dangerous goods number for quick identification.
Transportation conditions: Transport vehicles must have good ventilation facilities to prevent the accumulation of toxic gases after leakage. To avoid high temperatures, sun exposure, and rain, high temperatures may cause an increase in pressure inside the container, leading to leakage. Contact with rainwater can cause the hydrolysis of hafnium tetrachloride to produce corrosive substances, which can corrode packaging and vehicle components. During transportation, it is recommended to drive smoothly and reduce bumps and vibrations.
