Discover Best Manufacturers Calcium Hypochlorite for Your Disinfection Needs
Introduction
In today’s rapidly evolving water treatment and disinfection landscape, selecting the right calcium hypochlorite manufacturer is critical for businesses seeking reliable, high-quality chemical solutions. Calcium hypochlorite (Ca(OCl)₂), with CAS number 7778-54-3, remains one of the most widely used oxidizing and disinfecting agents across municipal water treatment, swimming pool sanitation, industrial wastewater management, and healthcare facilities.
This comprehensive technical guide examines the essential criteria for identifying premium calcium hypochlorite manufacturers, evaluates key performance specifications, and provides actionable insights for procurement professionals making informed sourcing decisions in 2026.
Understanding Calcium Hypochlorite: Technical Fundamentals
Chemical Composition and Properties
Calcium hypochlorite is an inorganic compound characterized by its powerful oxidizing capabilities. The technical specifications include:
| Parameter | Specification |
|---|---|
| Molecular Formula | Ca(OCl)₂ |
| Molecular Weight | 142.98 g/mol |
| CAS Number | 7778-54-3 |
| EINECS Number | 231-908-7 |
| Appearance | White powder or granular |
| pH Value (5% solution) | 11.5 |
| Melting Point | 100°C (decomposition) |
| Available Chlorine Content | 65%-70% (technical grade), 80%-85% (purified) |
| Solubility | Highly soluble in water with minimal residue |
Disinfection Mechanism
When dissolved in water, calcium hypochlorite releases hypochlorous acid (HOCl), the active disinfecting agent that effectively destroys bacteria, viruses, and algae through oxidation of cellular components. The alkaline nature of the solution (pH 11.5 at 5% concentration) provides additional stability during storage and transportation.
Critical Selection Criteria for Calcium Hypochlorite Manufacturers
1. Quality Management Certifications
Reputable manufacturers must demonstrate compliance with internationally recognized quality standards:
- ISO 9001:2015 – Quality Management System certification ensures consistent product quality and traceability
- ISO 14001 – Environmental Management System compliance indicates responsible manufacturing practices
- REACH Registration – Essential for European market access, confirming chemical safety compliance
- AWWA Standards – American Water Works Association certification for drinking water applications
2. Production Capacity and Supply Chain Reliability
Leading manufacturers typically maintain:
- Monthly production capacity exceeding 1,000 metric tons
- Multiple production facilities for supply continuity
- Strategic port access (Qingdao, Shanghai, Tianjin) for efficient export logistics
- Minimum order quantities (MOQ) ranging from 1 ton to 21 tons depending on product form
3. Technical Grade Specifications
| Grade Type | Available Chlorine | Application |
|---|---|---|
| Technical Grade | 65%-70% | Industrial water treatment, swimming pools |
| Purified Grade | 80%-85% | Drinking water disinfection, food processing |
| Tablet Form | 65%-70% | Residential pools, small-scale applications |
| Granular Form | 65%-70% | Large-scale municipal treatment |
Performance Data and Stability Characteristics
Decomposition Rates
High-quality calcium hypochlorite demonstrates exceptional stability under proper storage conditions:
- 210-day storage at ambient temperature: Only 1.87% decomposition rate
- Humidity resistance: Premium grades show minimal moisture absorption
- Temperature stability: Maintains efficacy up to 40°C storage conditions
Toxicity and Safety Profile
| Safety Parameter | Value |
|---|---|
| Acute Oral LD₅₀ (Rats) | 850 mg/kg |
| Hazard Classification | Oxidizer, Corrosive |
| UN Number | UN 1748 / UN 2880 |
| Storage Class | 5.1 (Oxidizing Substance) |
Disinfection Efficacy Benchmarks
Research indicates calcium hypochlorite achieves:
- 99.9% bacterial reduction within 30 minutes at 5 ppm concentration
- Complete viral inactivation at 10 ppm within 60 minutes
- Algae control maintained at 2-3 ppm residual chlorine levels
Industry Standards and Regulatory Compliance
International Standards Framework
Manufacturers should comply with multiple regulatory frameworks:
ASTM Standards:
- ASTM D7770-12(2019) – Testing methods for chemical emissions
- ASTM D8084-17 – Water treatment quality assessment
Chinese National Standards:
- GB/T Standard for Calcium Hypochlorite (Bleaching Powder)
- Administered by TC63 (National Chemical Standardization Technical Committee)
US Trade Considerations:
- Current antidumping duties of 210.52% apply to Chinese imports (as of January 2026 ITC ruling)
- Second sunset review confirmed continued measures through 2026
Documentation Requirements
Procurement teams should request:
- Certificate of Analysis (CoA) for each batch
- Material Safety Data Sheet (MSDS/SDS)
- REACH registration documentation (for EU markets)
- ISO certification copies
- Third-party laboratory test reports
Application-Specific Manufacturer Selection
Municipal Water Treatment
For drinking water applications, prioritize manufacturers offering:
- Purified grade (80%+ available chlorine)
- AWWA compliance documentation
- Low heavy metal content specifications
- Consistent particle size distribution
Swimming Pool and Recreation Facilities
Optimal supplier characteristics include:
- Tablet and granular form options
- 65%-70% available chlorine content
- Slow-dissolve formulations for extended efficacy
- Bulk packaging for cost efficiency
Industrial Wastewater Management
Key requirements encompass:
- High-volume supply capability
- Technical grade specifications
- Customized concentration options
- Emergency response support
Healthcare and Food Processing
Critical considerations involve:
- Food-grade certification
- Ultra-pure formulations
- Traceability documentation
- Rapid delivery capabilities
Pricing and Commercial Terms Analysis
Current Market Pricing (2025-2026)
| Product Form | Price Range | MOQ |
|---|---|---|
| Granular 65% | US$500-1,300/ton | 1 ton |
| Tablet 70% | US$0.80-1.30/kg | 1,000 kg |
| Bulk Granular | US$1,050-1,080/ton | 21 tons |
Payment Terms
Standard industry terms include:
- L/C (Letter of Credit) – Most secure for international transactions
- T/T (Telegraphic Transfer) – Common for established relationships
- D/P (Documents Against Payment) – Alternative financing option
Logistics Considerations
- Primary export ports: Qingdao, Shanghai, Tianjin
- Packaging: 25kg drums, 50kg bags, or bulk containers
- Shelf life: 24 months under proper storage conditions
- Transportation class: IMO 5.1 oxidizing substances
Risk Mitigation Strategies for Buyers
Supply Chain Diversification
- Engage multiple qualified suppliers across different regions
- Maintain 60-90 days inventory buffer for critical applications
- Establish contingency contracts for emergency supply
Quality Verification Protocols
- Implement incoming inspection testing for available chlorine content
- Conduct quarterly third-party laboratory analysis
- Maintain batch traceability records for regulatory compliance
Regulatory Compliance Monitoring
- Track antidumping duty changes affecting pricing
- Monitor REACH regulation updates for European markets
- Stay informed about transportation classification modifications
Emerging Trends in Calcium Hypochlorite Manufacturing
Sustainability Initiatives
Leading manufacturers are implementing:
- Energy-efficient production processes
- Reduced carbon footprint logistics
- Recyclable packaging solutions
- Water conservation in manufacturing
Technology Advancements
- Automated quality control systems
- Real-time batch monitoring
- Enhanced stability formulations
- Improved dissolution rate technologies
Market Dynamics
The global calcium hypochlorite market continues expanding through 2029, driven by:
- Increasing water treatment regulations
- Growing swimming pool construction
- Expanding industrial applications
- Heightened hygiene awareness post-pandemic
Frequently Asked Questions (FAQ)
Q1: What is the typical shelf life of calcium hypochlorite?
A: Properly stored calcium hypochlorite maintains efficacy for 24 months. Premium grades show only 1.87% decomposition over 210 days at ambient temperature. Store in cool, dry conditions away from direct sunlight and organic materials.
Q2: How do I verify manufacturer quality certifications?
A: Request original ISO 9001, ISO 14001, and REACH registration certificates. Verify certification numbers through issuing body databases. Ask for recent third-party audit reports and batch-specific Certificates of Analysis.
Q3: What available chlorine percentage should I specify for drinking water applications?
A: For drinking water treatment, specify purified grade with 80%-85% available chlorine content. Ensure AWWA compliance and request heavy metal analysis reports. Technical grade (65%-70%) is suitable for industrial and pool applications.
Q4: How do antidumping duties affect pricing?
A: As of January 2026, Chinese calcium hypochlorite faces 210.52% antidumping duties in the US market. Consider alternative sourcing regions or factor duties into total landed cost calculations. Some manufacturers offer third-country transshipment options.
Q5: What packaging options are available for bulk orders?
A: Standard packaging includes 25kg plastic drums, 50kg woven bags with PE liners, and bulk container options. Custom packaging available for orders exceeding 21 tons. All packaging must meet IMO 5.1 oxidizing substance transportation requirements.
Q6: How quickly can manufacturers deliver emergency orders?
A: Established manufacturers maintain safety stock for emergency fulfillment. Typical lead times range from 7-14 days for standard orders, with expedited 3-5 day options available for critical applications. Confirm emergency supply protocols during supplier qualification.
Q7: What testing should I conduct on incoming shipments?
A: Perform available chlorine content verification, pH measurement, moisture content analysis, and visual inspection for contamination. Maintain records for regulatory compliance. Conduct quarterly comprehensive third-party laboratory testing.
Q8: Are there REACH compliance requirements for calcium hypochlorite?
A: Yes, calcium hypochlorite requires REACH registration for EU market access. Verify supplier REACH registration status and request SVHC (Substances of Very High Concern) documentation. Non-compliant products cannot be legally imported into European markets.
Conclusion
Selecting the optimal calcium hypochlorite manufacturer requires comprehensive evaluation of technical capabilities, quality certifications, production capacity, and regulatory compliance. By applying the criteria outlined in this guide, procurement professionals can identify suppliers capable of delivering consistent, high-quality products that meet specific application requirements while maintaining competitive pricing and reliable supply chains.
The disinfection industry continues evolving with heightened quality expectations and regulatory scrutiny. Partnering with certified, experienced manufacturers ensures your organization maintains operational excellence while meeting all compliance obligations in 2026 and beyond.
For detailed product specifications and customized sourcing solutions, visit our contact page to connect with our technical sales team.
