CAS 1344-28-1: Aluminum Oxide (Alumina) (Al2O3)

Identity

CAS Number	1344-28-1
Molecular Formula	Al2O3
IUPAC Name	aluminum oxide
Molecular Weight	101.96 g/mol
SMILES	`[Al+3].[Al+3].[O-2].[O-2].[O-2]`
Synonyms	alumina, corundum, activated alumina, aluminum trioxide

2D Structure

Physical Properties

Density	3.95 g/mL at 25°C
Boiling Point	2977.0°C
Melting Point	2072.0°C
Flash Point	None°C
Vapor Pressure	0.0 kPa at 20°C
Refractive Index	nD = 1.765
Dielectric Constant	ε = 9.3

Safety & GHS Classification

Storage: Store in dry, well-ventilated area. Very low toxicity (nuisance dust). Fine powder may irritate respiratory tract — use dust mask. Inert and extremely stable.

Material Compatibility Matrix

Plastics

Material	Rating
PTFE	Excellent
PVC	Excellent
PE	Excellent
PP	Excellent
PEEK	Excellent
PVDF	Excellent

Rubbers

Material	Rating
Viton	Excellent
NBR	Excellent
EPDM	Excellent
Silicone	Excellent
FKM	Excellent

Metals

Material	Rating
Stainless 316	Excellent
Aluminum	Excellent
Copper	Excellent
Brass	Excellent

Applications

Chromatography stationary phase (HPLC, TLC)
Catalyst support (petroleum cracking)
Abrasives (sandpaper, grinding wheels)
Ceramics and refractories
Dental porcelain
Electrical insulator
Aluminum production (Hall-Héroult process)
Water filtration (activated alumina removes fluoride)

External References: PubChem

Related Chemicals

Cyclohexane (C6H12)

hexamethylene, hexanaphthene

Dichloromethane (Methylene Chloride) (CH2Cl2)

methylene chloride, DCM

Tetrahydrofuran (THF) (C4H8O)

THF, oxolane