Calcium Hypochlorite Tablets 70% — NSF-Certified Water Disinfection

Calcium hypochlorite tablets are a powerful unstabilized chlorine source widely used for drinking water treatment, indoor pool sanitation, and industrial water disinfection. Unlike TCCA tablets, calcium hypochlorite contains no cyanuric acid stabilizer, making it the preferred choice for applications where stabilizer buildup must be avoided. Everglory Industrial manufactures premium calcium hypochlorite tablets with 65–70% available chlorine, available in multiple tablet sizes for diverse applications.

Calcium Hypochlorite Tablets Technical Specifications

Why Choose Calcium Hypochlorite Tablets?

No Cyanuric Acid Buildup: The most significant advantage of calcium hypochlorite over TCCA is the absence of cyanuric acid (CYA). In indoor pools, spas, and drinking water systems, CYA accumulation is undesirable because it slows chlorine's killing effect without providing any UV protection benefit. Cal Hypo tablets eliminate this concern entirely.

NSF/ANSI 60 Certified for Drinking Water: Our drinking water grade calcium hypochlorite tablets meet NSF/ANSI Standard 60, the internationally recognized standard for chemicals used in drinking water treatment. This certification is mandatory for municipal water treatment applications in North America and many other regions.

Fast-Acting Disinfection: Calcium hypochlorite dissolves and reacts faster than TCCA, providing rapid initial chlorine residuals. This makes it ideal for shock chlorination, emergency water treatment, and applications requiring quick pathogen kill.

High pH Buffering: With a pH of 10–11, Cal Hypo tablets help raise water pH. This is beneficial in pools and water systems that tend to run acidic, reducing the need for separate pH adjustment chemicals.

Primary Applications

Drinking Water Treatment

Calcium hypochlorite tablets are extensively used for municipal water disinfection, community water systems, well water treatment, and emergency water purification. The tablet form enables precise dosing without the handling risks of liquid chlorine or the dust issues of powder. NSF certified tablets are available for potable water compliance.

Indoor Swimming Pools & Spas

For indoor pools where UV stabilization is unnecessary, calcium hypochlorite tablets provide powerful sanitization without CYA accumulation. Cal Hypo is also preferred for spa and hot tub treatment, where rapid disinfection is essential due to high bather-to-water ratios and elevated temperatures.

Food & Beverage Industry

Sanitation of food processing equipment, bottling lines, and preparation surfaces. The tablet form allows controlled preparation of sanitizing solutions at precise concentrations (e.g., 50–200 ppm free chlorine).

Industrial Process Water

Cooling tower water treatment, industrial cooling systems, and process water disinfection. Cal Hypo tablets provide consistent chlorine residual for biofilm control and Legionella prevention in cooling systems.

Emergency & Disaster Relief

Calcium hypochlorite tablets are stockpiled by government agencies and NGOs for emergency water treatment following natural disasters. The long shelf life, compact storage, and ease of transport make them ideal for emergency response kits.

Calcium Hypochlorite vs. TCCA Tablets

Packaging & Storage

Calcium hypochlorite is a Class 5.1 oxidizer and requires careful packaging and storage:

• Standard packaging: 25kg / 40kg / 50kg fiber drums with inner PE bag and moisture barrier
• Retail packaging: 1kg, 2kg, 5kg, 10kg plastic pails
• Storage conditions: Cool, dry, well-ventilated; temperature below 30°C; away from acids, ammonia, organics, and heat sources
• Shipping: Class 5.1 dangerous goods, packaged per IMDG regulations

Quality Assurance

Every production batch of calcium hypochlorite tablets is tested for available chlorine content, moisture, insoluble matter, heavy metals, and tablet hardness. Our quality control laboratory uses iodometric titration for chlorine content analysis, ensuring batch-to-batch consistency. Third-party SGS inspection and COA (Certificate of Analysis) are provided with every shipment.

Frequently Asked Questions

Q: Is calcium hypochlorite safe for drinking water treatment?

Yes, when used at appropriate dosages. Our NSF certified calcium hypochlorite tablets are specifically manufactured for potable water treatment. Typical dosage for drinking water disinfection is 0.5–2 mg/L (ppm) of chlorine, depending on water quality and organic load. Always verify chlorine residual after treatment.

Q: Can calcium hypochlorite tablets be used in outdoor pools?

Yes, but they are not ideal for outdoor pools because they lack UV stabilizer. In direct sunlight, unstabilized chlorine degrades rapidly — up to 90% loss within 2 hours. For outdoor pools, TCCA tablets are more cost-effective. Cal Hypo is better suited for indoor pools, drinking water, and industrial applications.

Q: Does calcium hypochlorite increase calcium hardness in pools?

Yes. Calcium hypochlorite adds calcium to the water, which increases calcium hardness over time. This is generally beneficial in soft water areas but requires monitoring in regions with naturally hard water. If calcium hardness exceeds 400 ppm, consider switching to a non-calcium-based sanitizer or partial water replacement.

Q: Can calcium hypochlorite tablets be mixed with TCCA tablets?

Never mix calcium hypochlorite with TCCA or any other chlorine compound. Mixing different chlorine types can cause violent chemical reactions, including heat generation, fire, and toxic gas release (nitrogen trichloride, chlorine gas). Always use only one type of chlorine in a chlorinator at a time.

Q: What certifications are available for your calcium hypochlorite tablets?

We provide ISO 9001:2015 certification, NSF and SGS pre-shipment inspection reports. Certificates of Analysis (COA) are included with every shipment. Additional certifications can be arranged upon request for specific market requirements.