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Calcium Oxide - UAE
- Origin
- : United Arab Emirates
- CAS Number
- : 1305-78-8
- HS Code
- : 2522.10.00
Basic Info
- IUPAC Name
- : calcium oxide
- Molecular Formula
- : CaO
- Molecular Weight (g/mol)
- : 56.0800
- Synonyms & Trade Names
- : Calcium oxide; Quicklime; Burnt lime; Unslaked lime
- Purity / Assay (%)
- : 90% min CaO
- Grade / Quality Level
- : Industrial Grade
- Physical Form
- : Solid
- Concentration
- : Pure substance
- Appearance / Color
- : White to off-white solid
- Odor
- : Odorless
- Melting Point (°C)
- : 2613.0000
- Boiling Point (°C)
- : 2613
- Density (g/cm³)
- : 3.3500
- Solubility in Water
- : Reacts with water
- Signal Word
- : Danger
- UN Number
- : 1910
- GHS Hazard Class
- : Skin corrosive; Eye corrosive; Respiratory irritant
- H-Statements
- : H290|H314|H318|H335
- P-Statements
- : P234|P260|P264|P271|P273|P280|P301+P330+P331
- REACH Status
- : Registered
- Drug Precursor Status
- : Non-precursor
- Storage Class (GHS)
- : 8
- Storage Conditions
- : Keep dry; protect from CO2 and moisture
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Brief Overview
Calcium oxide, commonly referred to as quicklime or burnt lime, is a highly caustic and alkaline white crystalline solid when at room temperature. It holds significance across various industries alongside calcium hydroxide due to its cost-effective production. With a melting point at 2570°C (4658°F) and a boiling point at 2850°C (5162°F), calcium oxide readily dissolves in water, forming calcium hydroxide—an alkaline solution recognized as hydrated lime, with the chemical formula Ca(OH)2.
Manufacturing Process
Calcium oxide is generated through the thermal breakdown of calcium carbonate materials, like limestone, within a lime kiln. Initially, limestone undergoes mining, followed by crushing and washing to eliminate impurities. Through calcination or lime burning, the material is heated, causing the release of carbon dioxide and the formation of quicklime. This process is reversible, as quicklime can react with carbon dioxide, reverting to calcium carbonate. To prevent this reversal, carbon dioxide is efficiently extracted, ensuring the prevention of reconversion to calcium carbonate.
