Calcium Oxide CAS#1305-78-8

1.High Reactivity – Calcium oxide undergoes rapid‑rate reactions with water and carbon dioxide, generating valuable substances including hydrated lime and limestone.

2. Natural Purity – It is sourced from natural raw materials such as limestone and oyster shells, which guarantees consistent high‑grade feedstock quality.

3. High‑Temperature Stability – Manufactured via calcination within 1,700‑2,450℃ temperature range, it delivers outstanding thermal resistance and reliable functional performance.

4. Versatile Applications – Thanks to its chemical activity and good adaptability to diverse processing requirements, it finds broad‑ranging deployment across multiple industrial sectors.

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Product Details

Calcium oxide (CaO, CAS 1305‑78‑8), often known as quicklime, burnt lime or calx, cannot be found as a naturally occurring mineral. It readily reacts with water to produce slaked lime and combines with carbon dioxide to form calcium carbonate. This substance is manufactured by calcining calcium carbonate feedstock, including limestone and oyster shells, at temperatures between 1700 °C and 2450 °C.

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/m3 OSHA: TWA 5 mg/m3 NIOSH: 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

Calcium Oxide CAS#1305-78-8

Product Usage

Lime enjoys extensive application across numerous industries including metallurgy, flue gas desulphurization, building construction, mining, paper manufacturing and water treatment. During iron ore refining, calcium oxide serves a critical function for impurity elimination. It reacts with silicates, phosphates, sulphates and other compounds contained in the ore to generate slag.

Calcium Oxide CAS#1305-78-8