Home Categories Inorganic chemistry Beryllium oxide
A1222212

Beryllium oxide , 99% , 1304-56-9

CAS NO.:1304-56-9

Empirical Formula: BeO

Molecular Weight: 25.01

MDL number: MFCD00003457

EINECS: 215-133-1

Update time: 2022-07-08

PRODUCT Properties

Melting point: 2575°C
Boiling point: 4300°C
Density  3.01 g/mL at 25 °C(lit.)
refractive index  1.733
Flash point: 4300°C
solubility  insoluble in H2O; slightly soluble in acid solutions, alkaline solutions
form  Powder
Specific Gravity 3.01
color  white
Water Solubility  Insoluble in water. Slowly soluble in concentrated acids, alkali hydroxides
Crystal Structure Hexagonal, Wurtzite (Zincite) Structure - Space Group P 63mc
crystal system Six sides
Merck  14,1172
Space group P63mc
Lattice constant
a/nmb/nmc/nmα/oβ/oγ/oV/nm3
0.26990.26990.438590901200.0277

Exposure limits ACGIH: TWA 0.00005 mg/m3
OSHA: Ceiling 2 μg/m3
NIOSH: IDLH 4 mg/m3; Ceiling 0.0005 mg/m3
Stability: Stable.

Description and Uses

Beryllium oxide (BeO) is formed by the ignition of beryllium metal in an oxygen atmosphere. The resulting solid is colourless and insoluble in water.

Beryllium oxide?is widely used in industry due to its low density and high thermal and electrical conductivity. It is used in high-technology ceramics, electronic heat sinks, electrical insulators, high-power devices, high-density electrical circuits, microwaves, X-ray windows, nuclear reactor fuels and for various aerospace and military applications.

Safety

Symbol(GHS) 
GHS06,GHS08
Signal word  Danger
Hazard statements  H301-H315-H317-H319-H330-H335-H350i-H372
Precautionary statements  P202-P260-P280-P302+P352-P304+P340+P310-P305+P351+P338
Hazard Codes  T+
Risk Statements  49-25-26-36/37/38-43-48/23
Safety Statements  53-45
RIDADR  UN 1566 6.1/PG 2
WGK Germany  1
RTECS  DS4025000
TSCA  Yes
HazardClass  6.1
PackingGroup  II

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