Calcium hydroxide

White crystalline powder, alkaline, odorless, inorganic.

White crystalline powder with strong alkaline properties, odorless, and inorganic. Commonly used in various applications such as food processing, water treatment, pharmaceuticals, construction, and more. Also known as slaked lime, it has a wide range of industrial uses due to its chemical properties and versatility.

Energy Sector

Calcium hydroxide, also known as slaked lime, finds various applications in the oil and gas industry. It is commonly used as a drilling fluid additive to adjust the pH and alkalinity of drilling fluids, and to control the viscosity and stability of drilling muds. It can also be used for neutralizing acid gases in gas streams, such as hydrogen sulfide (H2S), in oil and gas production. Additionally, calcium hydroxide is used for desulfurization and removal of impurities from crude oil, gas, and water in refining and processing operations.


Calcium hydroxide finds diverse applications in the pharmaceutical industry. It serves as an excipient in tablets, capsules, and suspensions, imparting specific physical and chemical characteristics. It is also used in dental products like toothpaste and mouthwashes for its antimicrobial and pH-regulating properties. Additionally, Calcium hydroxide is employed in the production of calcium supplements, antacids, and laxatives. Its alkaline nature makes it ideal for various pharmaceutical formulations, acting as an active ingredient, pH adjuster, or excipient as needed.

Pulp & Paper

Calcium Hydroxide, commonly known as hydrated lime, is extensively utilized in the pulp and paper industry for its versatile applications, particularly in water treatment and pH control. This chemical is essential for adjusting the pH of process water used in paper mills, which is critical for ensuring optimal chemical reactions during paper production and for preventing corrosion in machinery. The alkaline nature of Calcium Hydroxide also aids in precipitating dissolved impurities and softening water by removing hardness-causing minerals through neutralization reactions.

In addition to its role in water treatment, Calcium Hydroxide is used in the bleaching process of pulp. Here, it serves to enhance the effectiveness of bleaching agents by maintaining a stable alkaline environment, crucial for achieving high-quality, bright pulp with reduced lignin content. The application of Calcium Hydroxide in these processes not only supports the production of superior paper products but also contributes to the environmental management efforts of paper mills by helping to treat and recycle water efficiently, minimizing waste and reducing the overall environmental footprint of the industry.

Water Treatment

Calcium hydroxide, or slaked lime, is a commonly used water treatment chemical. It is used to adjust pH, aid in coagulation and flocculation, and soften hard water in drinking water and wastewater treatment. Its alkaline properties help control acidity and alkalinity, while its ability to precipitate calcium and magnesium ions aids in solid particle removal. Calcium hydroxide is a versatile and effective water treatment chemical, ensuring clean and safe water supply by optimizing water treatment processes and meeting regulatory standards.

CAS No.: 1305-62-0


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