Product Specifications & Basic Information
Calcium oxide (Chemical formula: CaO, CAS Registry Number: 1305-78-8) is professionally known as quicklime, burnt lime or calx. As an active inorganic compound, it cannot exist stably in the natural environment, as it is prone to spontaneous reactions with water to produce hydrated lime, and with atmospheric carbon dioxide to form limestone sediment. Industrial-grade calcium oxide is artificially processed by high-temperature calcination of natural calcium carbonate-based raw materials such as limestone and oyster shells within a temperature range of 1,700℃ to 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/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 |
Industrial Application Scope
Calcium oxide is a fundamental industrial chemical material with comprehensive application coverage across multiple core industries, including metallurgical engineering, industrial flue gas desulfurization, building engineering, mineral processing, papermaking manufacturing and industrial wastewater treatment.
In the iron ore smelting and refining industry, calcium oxide acts as a critical impurity removal agent. It can chemically react with harmful impurities such as silicates, phosphates and sulfates contained in raw iron ore, converting these impurities into removable slag substances. This purification effect effectively improves the purity of finished iron products and ensures the smooth progress of metallurgical production.
Company Profile
Laisen New Materials (Shandong) Co., Ltd., based in Jinan, Shandong Province, is a professional fine-chemical and new functional materials company integrating product supply, technical services, and import & export trade.
With nearly 10 years of industry experience, Laisen specializes in specialty chemicals, polymer additives, functional chemical raw materials, and new building materials. Its products are widely used in new energy, coatings, plastics, rubber & plastics, construction, and environmental protection.
With a rigorous quality-control system and professional technical team, Laisen provides material selection, formulation support, technical consultation, and customized supply-chain solutions.
Serving 500+ industrial customers worldwide, Laisen's products have been exported to 50+ countries and regions across Asia, the Americas, Europe, Africa, and Oceania. The company is committed to delivering reliable products, professional technical support, and efficient global services.
