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/nm	b/nm	c/nm	α/o	β/o	γ/o	V/nm3
0.2699	0.2699	0.4385	90	90	120	0.0277

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.
CAS DataBase Reference :1304-56-9(CAS DataBase Reference)
EPA Substance Registry System :Beryllium oxide (1304-56-9)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H301 Toxic if swalloed Acute toxicity,oral Category 3 Danger P264, P270, P301+P310, P321, P330,P405, P501 H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362 H317 May cause an allergic skin reaction Sensitisation, Skin Category 1 Warning P261, P272, P280, P302+P352,P333+P313, P321, P363, P501 H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P H330 Fatal if inhaled Acute toxicity,inhalation Category 1, 2 Danger P260, P271, P284, P304+P340, P310,P320, P403+P233, P405, P501 H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning H372 Causes damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 1 Danger P260, P264, P270, P314, P501
Precautionary statements:	P202 Do not handle until all safety precautions have been read and understood. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P280 Wear protective gloves/protective clothing/eye protection/face protection. P302+P352 IF ON SKIN: wash with plenty of soap and water. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.