Procurement Report: Calcium Hypochlorite (70%)

Product Category: Industrial Chemicals / Water Treatment Disinfectants Primary Active Ingredient: Calcium Hypochlorite (Ca(OCl)₂) Typical Active Chlorine Content: 65% – 70%

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1. Technical Specifications and Performance Metrics

Calcium Hypochlorite is a dry, granular, or tablet-form chemical widely recognized for its high concentration of available chlorine. It serves as a potent algicide, bactericide, and deodorizer. Procurement specifications should focus on the stability of the active chlorine and solubility rates.

• Active Chlorine Content: Typically ranges between 65% and 70% by weight. This high concentration makes it significantly more efficient by volume compared to liquid sodium hypochlorite.
• Solubility: The product is characterized as "highly soluble" in water, allowing for rapid dissolution in dosing systems.
• Physical Form: Available as granules, tablets, or powder. Granular forms are preferred for automated dosing systems to prevent clogging.
• pH Impact: When dissolved, it raises the pH of the water slightly due to the calcium content, which must be factored into water balance calculations.
• Shelf Life: Dry storage is critical. Typical shelf life is 12 to 24 months if kept in a cool, dry environment away from direct sunlight and organic contaminants.

Procurement Recommendation: When sourcing, request a Certificate of Analysis (CoA) for every batch to verify the active chlorine concentration. Do not rely solely on the label; perform preliminary laboratory tests to confirm the concentration matches the purchase order, as degradation can occur during transport if packaging is compromised.

2. Industry Compliance and Quality Assurance

While specific named certifications were not provided in the source context, the industry standard for Calcium Hypochlorite relies heavily on batch consistency and purity verification.

• Quality Verification: The most reliable method for quality assurance is sending a sample to a certified laboratory to determine the exact concentration of active chlorine.
• Safety Standards: As a strong oxidizer, the product requires compliance with hazardous material transport regulations (e.g., UN 1748).
• Purity Requirements: High-grade industrial grades should have minimal impurities (such as chlorides or carbonates) that could interfere with water treatment processes or cause scaling in pipes.
• Documentation: Suppliers must provide a Certificate of Analysis (CoA) detailing the percentage of active chlorine, moisture content, and particle size distribution.

Procurement Recommendation: Include a clause in the purchase agreement requiring a preliminary test by the buyer's lab upon receipt. If the active chlorine concentration falls below the agreed threshold (e.g., <65%), the batch should be rejected or renegotiated. Ensure the supplier adheres to local hazardous material handling and transport regulations.

3. Cost Efficiency and Integration Capabilities

Calcium Hypochlorite offers a distinct cost advantage over liquid chlorine due to its high concentration and ease of storage.

• Storage Efficiency: Because it is a solid with ~70% active chlorine, it requires significantly less storage space and volume compared to liquid alternatives (which are often ~10-15% chlorine).
• Transportation Costs: Shipping dry solids is generally more cost-effective per unit of active chlorine than shipping heavy liquid solutions.
• Dosing Systems: Compatible with standard automated chlorination systems. However, the system must be designed to handle the slightly higher pH impact and potential for calcium scaling.
• MOQ (Minimum Order Quantity): Typical B2B ranges for bulk granular forms are 500 kg to 1 metric ton per pallet, though smaller bagged quantities (25kg) are available for smaller facilities.
• Lead Time: Standard lead times for international or domestic bulk shipments typically range from 2 to 4 weeks, depending on supplier stock levels.

Procurement Recommendation: Calculate the total cost of ownership (TCO) including storage infrastructure. While the unit price of Calcium Hypochlorite may be higher than liquid chlorine, the savings in storage space, transport volume, and handling labor often result in a lower TCO for medium-to-large scale operations. Ensure your dosing pumps are rated for slightly abrasive granular inputs if using powder forms.

4. Typical Use Cases

Based on its algicidal, bactericidal, and deodorizing properties, Calcium Hypochlorite is deployed in various water treatment scenarios.

• Potable Water Purification: Used for the disinfection of drinking water supplies to eliminate pathogens and ensure safety standards.
• Swimming Pools and Recreational Water: Highly effective for shock treatment to kill algae and bacteria, and for maintaining residual chlorine levels.
• Wastewater Treatment: Applied in municipal and industrial wastewater treatment plants to disinfect effluent before discharge.
• Industrial Cooling Towers: Used to control biological growth (biofilm) in cooling water systems.
• Emergency Disinfection: Ideal for emergency water purification in disaster relief scenarios due to its stability and ease of transport.

Procurement Recommendation: Match the product form to the application. Use tablets for slow-release applications in swimming pools and granules for rapid dissolution in industrial dosing systems. For potable water applications, strictly verify that the product meets local drinking water safety standards regarding heavy metal impurities.

5. Long-Term Planning Considerations

The demand for water disinfection chemicals remains stable, driven by global infrastructure development and stricter environmental regulations.

• Market Trends: There is a growing emphasis on "dry" disinfectants due to the logistical challenges of transporting and storing large volumes of liquid chlorine.
• Demand Signals: Increasing urbanization and the need for reliable potable water in developing regions drive steady demand for high-concentration disinfectants.
• Supply Chain Resilience: Suppliers should be vetted for their ability to maintain consistent active chlorine levels over time. Moisture ingress is the primary risk factor for degradation.
• Regulatory Outlook: Expect tightening regulations on chlorine residuals and by-products, necessitating precise dosing capabilities.

Procurement Recommendation: Develop a safety stock strategy of at least 3 months of usage, as the product is sensitive to humidity. Secure contracts with suppliers who offer moisture-proof packaging (e.g., double-lined bags or sealed drums). Plan for the integration of automated dosing systems to minimize human error and ensure precise chlorine demand management.

6. Special Product Recommendations

The following comparison table outlines the best-fit buyer profiles and key considerations for different forms of Calcium Hypochlorite.

| Product Type | Best-Fit Buyer | Key Specs | Risk Check | Procurement Advice | | :--- | :--- | :--- | :--- :--- | | Granular (70%) | Municipal Water Plants, Industrial Cooling Towers | High solubility, 65-70% Active Chlorine | Moisture absorption leading to clumping | Verify packaging integrity; use automated feeders. | | Tablets (70%) | Swimming Pools, Small Commercial Facilities | Slow-release, easy handling | Over-chlorination if not controlled | Use floating feeders or automatic feeders with timers. | | Powder (65-70%) | Emergency Response, Small Batch Treatment | Rapid dissolution, high surface area | Dust inhalation hazards | Use PPE (masks/goggles); store in sealed containers. |

Procurement Recommendation: For large-scale industrial applications, granular forms are recommended for their balance of solubility and flowability. For recreational facilities, tablets offer the best operational convenience. Always request a sample for a "dissolution test" before committing to a bulk order to ensure the product meets your specific equipment requirements.

7. Frequently Asked Questions (FAQ)

1. How do I verify the quality of Calcium Hypochlorite upon delivery? The most reliable method is to send a sample to a certified laboratory to determine the concentration of active chlorine. Do not rely solely on the supplier's label; perform preliminary tests to confirm the characteristics match the CoA.

2. What is the typical shelf life of Calcium Hypochlorite? When stored in a cool, dry place away from direct sunlight and incompatible materials, the product typically retains efficacy for 12 to 24 months. Degradation accelerates if the packaging is exposed to moisture.

3. Can Calcium Hypochlorite be used for drinking water? Yes, it is widely used for the purification of potable water due to its strong bactericidal and algicidal properties. However, the final water must be tested to ensure chlorine residuals and by-products meet local health regulations.

4. How is the dosage calculated for a water treatment system? Dosage is determined by the "chlorine demand" of the water. This is a technical procedure requiring the calculation of the exact amount of disinfectant needed to achieve a specific residual chlorine level after accounting for organic and inorganic contaminants.

5. Is Calcium Hypochlorite safer to store than liquid chlorine? Generally, yes. As a dry solid with high concentration, it requires less storage volume and eliminates the risk of large-scale liquid spills. However, it is a strong oxidizer and must be stored away from organic materials and acids to prevent fire or explosion hazards.

6. What happens if the product absorbs moisture? Moisture absorption can cause the product to clump (granules) or degrade, reducing the active chlorine percentage. It can also lead to the formation of calcium carbonate scale in dosing equipment.

7. What is the Minimum Order Quantity (MOQ) for bulk purchases? While specific MOQs vary by supplier, typical B2B ranges for bulk granular forms start at 500 kg to 1 metric ton. Smaller quantities (e.g., 25kg bags) are available for smaller facilities or trial orders.

8. Does this product affect the pH of the water? Yes, Calcium Hypochlorite tends to raise the pH of the water slightly due to the presence of calcium hydroxide formed during dissolution. This should be factored into your water balance management plan.