Hafnium
[CAS# 7440-58-6]

Identification

• Classification: Inorganic chemical industry >> Simple substance
• Name: Hafnium
• Synonyms: Celtium; GFE 1; Hafnium element
• Molecular Formula: Hf
• Molecular Weight: 178.49
• CAS Registry Number: 7440-58-6
• EC Number: 231-166-4

Properties

• Density: 13.31 g/cm^3*
• Melting point: 2227 °C^*

^* "International Chemical Safety Cards" data were obtained from the National Institute for Occupational Safety and Health (US)

Safety Data

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Pyrophoric solids	Pyr. Sol.	1	H250
Chronic hazardous to the aquatic environment	Aquatic Chronic	4	H413
Flammable solids	Flam. Sol.	1	H228
Skin corrosion	Skin Corr.	1B	H314
Acute toxicity	Acute Tox.	4	H312
Acute toxicity	Acute Tox.	4	H332
Acute toxicity	Acute Tox.	4	H302
Flammable solids	Flam. Sol.	2	H228
Specific target organ toxicity - repeated exposure	STOT RE	2	H373
Self-heating substances or mixtures	Self-heat.	1	H251
Specific target organ toxicity - single exposure	STOT SE	3	H335
Eye irritation	Eye Irrit.	2	H319