Calcium Oxide (CaO)

Calcium Oxide (CaO), commonly known as quicklime, is a highly versatile industrial chemical widely used in manufacturing, construction, environmental management, and specialty applications. Recognized for its reactivity, alkalinity, and ability to adjust pH, calcium oxide is an essential material in processes that require neutralization, stabilization, or high-temperature performance. Its strong chemical activity makes it a cornerstone raw material in steelmaking, cement production, glass manufacturing, and chemical synthesis.

Calcium Oxide also plays a vital role in water and wastewater treatment, where it neutralizes acidity, removes impurities, and improves overall water quality. It is applied in paper production, food processing (as an additive and pH regulator), agriculture (soil stabilization and pest control), and flue gas treatment to reduce environmental emissions. With its cost-effectiveness, reliability, and multifunctional performance, calcium oxide continues to be an indispensable material across industries such as construction, metallurgy, agriculture, energy, and specialty chemicals.

Synonyms: Quicklime, lime, burnt lime

Characteristics:

IUPAC Name: Oxocalcium

CAS Number: 1305-78-8

UN Number: 1910

Recommended Use / Industries:

• Steel and metallurgy industry (flux, desulfurization)
• Water and wastewater treatment
• Construction (cement, mortars)
• Pulp and paper processing