Hafnium oxide
[CAS# 12055-23-1]

Identification

• Classification: Inorganic chemical industry >> Inorganic salt >> Oxides of rare earth metals, yttrium or scandium
• Name: Hafnium oxide
• Synonyms: Hafnium dioxide
• Molecular Formula: HfO₂
• Molecular Weight: 210.49
• CAS Registry Number: 12055-23-1
• EC Number: 235-013-2

Properties

• Density: 9.7 g/cm^3*
• Melting point: 2780 ºC^**
• Refractive index: 2.13 (1700 nm)^***

^* Conley, J. F., Jr.; Materials Research Society Symposium Proceedings 2003, V765(CMOS Front-End Materials and Process Technology), P91-96.

^** Reicher, David; Proceedings of SPIE-The International Society for Optical Engineering 2005, V5647(Laser-Induced Damage in Optical Materials: 2004), P26-33.

^*** Ying, Zhifeng; Journal of Materials Research 2010, V25(4), P680-686.

Safety Data

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Eye irritation	Eye Irrit.	2	H319
Specific target organ toxicity - single exposure	STOT SE	3	H335
Skin irritation	Skin Irrit.	2	H315
Chronic hazardous to the aquatic environment	Aquatic Chronic	4	H413