Key Features

Cal Hypo Granular is a high‑chlorine, free‑flowing granular calcium hypochlorite product designed for effective water disinfection and sanitation. It typically contains 65%–70% available chlorine, dissolves quickly in water, and releases powerful oxidizing agents that eliminate bacteria, algae, viruses, and other harmful contaminants. This granular form provides easy handling, flexible dosing, and rapid action, making it suitable for both routine and shock chlorination of pools, spas, and water systems requiring strong sanitization.

Chemical Composition & Properties

Cal Hypo Granular is composed primarily of calcium hypochlorite (chemical formula Ca(ClO)₂), appearing as white or slightly gray granules in various mesh sizes such as 8–30, 10–30, 12–50, or 14–50. It is a strong oxidizer that readily dissolves in water to generate hypochlorous acid, the active disinfecting species, while its dry form offers good stability and long shelf life when stored properly.

Product Description

When added to water, Cal Hypo Granular reacts to produce hypochlorous acid and hypochlorite ions that act as potent sanitizers. These active chlorine species penetrate the cell walls of microorganisms and disrupt essential cellular processes, achieving effective disinfection. Cal Hypo Granular supports oxidation of organic matter and helps maintain clear, hygienic, and safe water conditions, making it a preferred choice for heavy sanitization events like shocking and contamination cleanup.

Applications in Pool & Water Treatment

Cal Hypo Granular is widely used for swimming pool and spa sanitization, where it kills algae, bacteria, and pathogens and restores water clarity after heavy use, rain, or algae outbreaks. It also serves as a disinfectant in industrial water treatment, drinking water purification (in emergency or controlled scenarios), wastewater disinfection, and other sanitation applications requiring strong microbial control. Its effectiveness and flexibility make it suitable for both residential and commercial water systems.

Mechanism of Action

The core disinfecting action of Cal Hypo Granular is based on the release of hypochlorous acid when it dissolves in water. Hypochlorous acid is a highly reactive oxidizing agent that destroys microorganisms by disrupting cell membranes, oxidizing essential proteins and enzymes, and inhibiting metabolic functions. This mechanism ensures rapid pathogen inactivation while maintaining active chlorine residuals for continued protection.

Usage & Dosing Guidelines

Proper dosing of Cal Hypo Granular depends on water volume, existing water chemistry, and sanitation goals. In pool applications, dosing should be calibrated to achieve recommended free chlorine levels, typically 1–3 ppm for routine sanitation and higher for shock treatments. Users should dissolve the granules in a bucket of water before adding to the larger water body or broadcast them evenly across the surface while the circulation system runs to ensure uniform distribution. Always test chlorine and pH levels before and after application.

Benefits

Cal Hypo Granular offers rapid and reliable disinfection with strong oxidation capacity, effectively eliminating a wide range of contaminants. Compared with liquid chlorine, granular calcium hypochlorite is less susceptible to sunlight degradation, has longer shelf life, and requires less frequent dosing. It is suitable for handling heavy pool use, algae control, and emergency sanitization needs, providing cost‑effective performance with flexible application.

Safety Considerations

Handling Cal Hypo Granular requires appropriate personal protective equipment such as gloves, eye protection, and masks to avoid irritation from dust or splashes. It should never be mixed with other chlorine products or acids, as such mixtures can cause dangerous reactions, fire, or release toxic gases. Always add chemical to water—not water to chemical—to avoid violent reactions and ensure safe use.

Storage Instructions

Store Cal Hypo Granular in a cool, dry, and well‑ventilated area away from moisture, heat, and sunlight to preserve available chlorine. Keep containers tightly sealed and separate from organic materials, acids, and reducing agents to prevent degradation and unsafe reactions. Regularly inspect storage conditions and packaging integrity to maintain long‑term effectiveness and safety.