Name: Calcium Oxide CAS#1305-78-8
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Calcium Oxide CAS#1305-78-8

Calcium Oxide CAS#1305-78-8
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Chemical Name：Calcium Oxide
CAS No.:1305-78-8
Molecular Formula：CaO
Sample: Available
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Calcium Oxide CAS#1305-78-8

Calcium oxide (CaO, CAS Reg. No. 1305-78-8) is also known as lime, quick lime, burnt lime, or calx. Lime does not occur naturally since it reacts so readily with water (to form hydrated lime) and carbon dioxide (to form limestone). It is produced from calcium carbonate, limestone, or oyster shells by calcination at temperatures of 1,700-2,450℃.

Calcium oxide Chemical Properties

Melting point	2570 °C
Boiling point	2850 °C (lit.)
density	3.3 g/mL at 25 °C (lit.)
bulk density	800-1200kg/m3
refractive index	1.83
Fp	2850°C
storage temp.	no restrictions.
solubility	1.65g/l Risk of violent reaction.
form	powder
color	White to yellow-very slightly beige
Specific Gravity	3.3
PH	12.6 (H2O, 20℃)(saturated solution)
Odor	wh. or gray cryst. or powd., odorless
Water Solubility	REACTS
Sensitive	Air & Moisture Sensitive
Crystal Structure	Cubic
crystal system	Cube
Merck	14,1686
Space group	Fm3m
Lattice constant	a/nmb/nmc/nmα/oβ/oγ/oV/nm30.47760.47760.47769090900.1089
Dielectric constant	2.2（Ambient）
Exposure limits	ACGIH: TWA 2 mg/m3OSHA: TWA 5 mg/m3NIOSH: IDLH 25 mg/m3; TWA 2 mg/m3
Stability:	Stability Stable, but absorbs carbon dioxide from the air. Incompatible with water, moisture, fluorine, strong acids.
InChIKey	ODINCKMPIJJUCX-UHFFFAOYSA-N
CAS DataBase Reference	1305-78-8(CAS DataBase Reference)
NIST Chemistry Reference	Calcium monoxide(1305-78-8)
EPA Substance Registry System	Calcium oxide (1305-78-8

Product Usage

The major uses of lime are metallurgy, flue gas desulfurization, construction, mining, papermaking, and water treatment. Calcium oxide is used to remove impurities during the refining of iron ore. Calcium oxide combines with compounds such as silicates, phosphates, and sulfates contained in iron ores to form slag.

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