Hafnium(IV) oxide

CAS 12055-23-1HfO2Metal & Ceramic Science

Hafnium(IV) oxide (CAS: 12055-23-1, HfO2) is a high-purity white powder with a molecular weight of 210.49 g/mol. Exhibiting a density of 9.68 g/mL at 25 °C, this oxide is known for its exceptional thermal stability and dielectric properties. It finds significant application as a dielectric material in microelectronics, in the production of advanced ceramics, and as a refractory material due to its high melting point.

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Hafnium(IV) oxide (HfO2) — chemical structure, CAS 12055-23-1; Materials Science, fine chemical supplied by Tech Serve Solutions

HafniumMaterials ScienceMetal and Ceramic ScienceOxides

01 /Applications

High-k Dielectric Material

Hafnium(IV) oxide is a crucial material in the semiconductor industry, serving as a high-k dielectric layer in advanced transistors to enable further miniaturisation and improve device performance.

Advanced Ceramics

Its refractory properties and thermal stability make HfO2 a valuable component in the manufacturing of high-performance ceramics for demanding applications, including components for aerospace and industrial furnaces.

Optical Coatings

The high refractive index and transparency in certain wavelength ranges allow Hafnium(IV) oxide to be used in optical coatings, enhancing the performance of lenses and other optical components.

Refractory Applications

Due to its very high melting point and resistance to chemical attack, it is employed as a refractory material in crucibles and high-temperature vessels for specialised metallurgical processes.

02 /Properties

Molecular weight	210.49
Empirical formula	HfO2
Assay	98%
Form	powder
Density	9.68 g/mL at 25 °C(lit.)

03 /Safety & handling

Protective equipment	Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter
Water hazard class (WGK, DE)	3

Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.

04 /Identifiers & registry

CAS number

12055-23-1

MDL number

MFCD00003565

PubChem substance

24852168

05 /Quality & supply

Documentation

Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.

Supply & logistics

Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.

06 /Frequently asked questions

What is Hafnium(IV) oxide used for?

Hafnium(IV) oxide is primarily used as a high-k dielectric material in microelectronics, in the production of advanced ceramics, as a refractory material, and in optical coatings.

What is the CAS number and chemical formula for Hafnium(IV) oxide?

The CAS number for Hafnium(IV) oxide is 12055-23-1, and its chemical formula is HfO2.

What grade and purity does Tech Serve Solutions supply?

Tech Serve Solutions supplies Hafnium(IV) oxide with an assay of 98%. We do not represent this product as USP, BP, or EP grade.

What are the safety and handling considerations for Hafnium(IV) oxide?

Handle Hafnium(IV) oxide with appropriate personal protective equipment, including eyeshields and gloves. A type N95 (US) or type P1 (EN143) respirator filter is recommended. Observe good laboratory practices to avoid dust formation and inhalation. It is classified under WGK Germany 3.