Key Features

Calcium Hypochlorite 70% is a high-strength chlorine-based disinfectant and oxidizing agent widely used for water treatment and sanitation. Containing at least 70% available chlorine, this granular or tablet form dissolves in water to release hypochlorous acid, a potent antimicrobial species that effectively kills bacteria, viruses, and algae while oxidizing organic contaminants. Its high chlorine content delivers rapid, broad-spectrum disinfection for demanding applications in pools, drinking water, wastewater, and industrial sanitation.

Chemical Composition & Properties

Chemically represented as Ca(ClO)₂, Calcium Hypochlorite 70% typically appears as white or off-white granular solids with a characteristic chlorine odor. It is a strong oxidizer that dissolves readily in water, producing hypochlorous acid and hypochlorite ions responsible for its disinfecting action. Compared with lower-strength chlorine sources, the 70% grade offers superior available chlorine content, low moisture, high stability, and rapid solubility — ideal for reliable performance across multiple environments.

Product Description

As a high-strength disinfectant, Calcium Hypochlorite 70% releases active chlorine species that penetrate microbial cell walls and disrupt essential cellular processes, leading to rapid inactivation of pathogens and effective sanitation. It maintains a residual disinfectant level after treatment, helping prevent microbial regrowth. This makes it suitable not only for water sanitation but also for surface and equipment disinfection where high-efficiency germ control is required.

Applications in Water Treatment & Sanitation

Calcium Hypochlorite 70% is extensively used for swimming pool sanitation and shock chlorination, effectively controlling algae, bacteria, and organic waste while maintaining clear water. It also serves in drinking water treatment, particularly in emergency or municipal applications to safeguard potable supplies, and in wastewater treatment to disinfect effluents before discharge. Beyond water, it is used in industrial sanitation, surface disinfection in healthcare and food processing, and general hygiene control.

Mechanism of Action

The disinfecting action of Calcium Hypochlorite 70% is based on the formation of hypochlorous acid (HOCl) when it dissolves in water. Hypochlorous acid is a highly reactive oxidizing agent that attacks microbial cell membranes, denatures proteins, and interferes with metabolic functions, leading to the inactivation of bacteria, viruses, and algae. The oxidation process also helps break down organic impurities, improving overall water quality and safety.

Usage & Dosing Guidelines

Effective dosing of Calcium Hypochlorite 70% depends on water volume, contamination level, and treatment goal. For pool maintenance, measured doses are typically added to achieve recommended free chlorine levels, monitored in parts per million (ppm). For shock or emergency treatments, higher doses are used to rapidly elevate available chlorine. Pre-dissolving the product in a separate container before adding to the main water body helps ensure even distribution and effective dissolution. Regular water quality testing before and after application is recommended.

Benefits

Calcium Hypochlorite 70% offers rapid and broad-spectrum disinfection with strong oxidation capacity and high chlorine content, requiring smaller amounts for equivalent microbial control compared to lower-strength chlorine sources. Its solid form is stable with a long shelf life when stored properly, and it is easy to handle and dose. These features make it cost-effective for large-scale water treatment, pool sanitation, and industrial hygiene applications.

Safety Considerations

Handling Calcium Hypochlorite 70% requires appropriate personal protective equipment such as gloves and eye protection to avoid irritation from chemical exposure. It should never be mixed with acids, ammonia, or incompatible chemicals, as such combinations can produce toxic gases or hazardous reactions. Adequate ventilation is essential when working with concentrated granules or dust to reduce risk of inhalation.

Storage Instructions

Store Calcium Hypochlorite 70% in a cool, dry, and well-ventilated area away from direct sunlight, heat, and moisture to preserve available chlorine content and prevent decomposition. Keep it in sealed containers, separated from organic materials, acids, and reducing agents to avoid unsafe reactions. Regularly inspect storage conditions and packaging to maintain long-term product effectiveness and safety.