Product Details
Calcium oxide (CaO, CAS No. 1305-78-8), commonly known as lime, quicklime, burnt lime, or calx, does not occur naturally. This is because it readily combines with water to form hydrated lime and with carbon dioxide to produce limestone. It is produced by calcining calcium carbonate-containing materials like limestone or oyster shells at a temperature range of 1,700 to 2,450°C.
Product Usage
Lime is widely applied in numerous industries, such as metallurgy, flue gas desulfurization, construction, mining, papermaking, and water treatment. In the refining of iron ore, calcium oxide plays a crucial role in removing impurities: it reacts with compounds like silicates, phosphates, and sulfates present in the ore to form slag.
| 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 |
