Calcium Oxide - UAE

Origin: United Arab Emirates
CAS Number: 1305-78-8
HS Code: 2522.10.00

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

Technical Document

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.