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Cas Database

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

Hafnium oxide (HfO2) 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;

...Expand

: 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

The Hafnium oxide (HfO₂), with its CAS registry number 12055-23-1, has the systematic name of dioxohafnium. It has the molecular foumula of HfO₂ and the formula weight of 210.49. And it belongs to the product categories which include Inorganics; Hafnium; Metal and Ceramic Science; Oxides. When you are using this chemical, you should avoid contacting with skin and eyes and then do not breathe dust. This chemical is stable when in normal temperature and normal pressure. When keep this chemical, store it in the cool and well-ventilated place, away from the acid. When comes to its usage, it is often used in the spectral analysis, catalyst system and resistance material.

The characteristics of Hafnium oxide (HfO₂) are as follows: (1)#H bond acceptors: 2; (2)#H bond donors: 0; (3)#Freely Rotating Bonds: 0; (4)Polar Surface Area: 34.14. As to its producing method, the hafnium could react with oxygen to produce hafnium oxide.

What's more, the following datas could be converted into the molecular structure:
(1)SMILES:O=[Hf]=O
(2)InChI:InChI=1/Hf.2O/rHfO2/c2-1-3
(3)InChIKey:CJNBYAVZURUTKZ-MSHMTBKAAI
(4)Std. InChI:InChI=1S/Hf.2O
(5)Std. InChIKey:CJNBYAVZURUTKZ-UHFFFAOYSA-N

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