• Name

  HAFNIUM OXIDE

• EINECS 235-013-2
• CAS No. 12055-23-1
• Article Data1
• CAS DataBase
• Density 9.68 g/mL at 25 °C(lit.)
• Solubility Insoluble in water.
• Melting Point 2810 °C
• Formula HfO₂
• Boiling Point
• Molecular Weight 210.489
• Flash Point
• Transport Information
• Appearance powder
• Safety 22-24/25
• Risk Codes
• Molecular Structure
• Hazard Symbols
• Synonyms Hafnia;Hafnia (HfO2);Hafnium dioxide;Hafnium dioxide (HfO2);Hafnotrast;Hf 05;Hf 05 (oxide);NSC 158931;
• PSA 34.14000
• LogP -0.23760

Synthetic route

hafnium

124-43-6

urea hydrogen peroxide adduct

A

12055-23-1

hafnium dioxide

B

C

HHfO

D

91223-89-1

hafnium dihydroxide

Conditions

Conditions	Yield
In gaseous matrix laser-ablated Hf atoms were reacted with H2O2 molecules in excess argon during condensation onto a 10 K cesium iodide window; Andrews, L. Chem. Soc. Rev., 2004, 33, 123; detected by IR spectra;

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hafnium

1333-74-0

hydrogen

80937-33-3

oxygen

A

12055-23-1

hafnium dioxide

B

12027-05-3

hafnium hydroxide

C

HHfO

D

91223-89-1

hafnium dihydroxide

E

12770-26-2

HfH2

Conditions

Conditions	Yield
In gaseous matrix byproducts: HfH4; other Radiation; laser-ablated Hf atoms were reacted with H2 and O2 molecules in excess argon full-arc irradiation and annealin to 24-30 K; Andrews, L. Chem. Soc. Rev., 2004, 33, 123; detected by IR spectra;

...Expand

12055-23-1

hafnium dioxide

1885-14-9

phenyl chloroformate

102-09-0

bis(phenyl) carbonate

12055-23-1

hafnium dioxide

108-95-2

phenol

102-09-0

bis(phenyl) carbonate

Hafnium oxide (HfO2) Specification