Calcium Hypochlorite Powder — Industrial-Grade Granular Chlorine for Water Treatment

Calcium hypochlorite powder is one of the most widely searched terms in the global B2B water treatment chemical market. In commercial trade, many buyers, distributors, and procurement officers use the word "powder" to refer to the solid granular form of calcium hypochlorite — the free-flowing white crystalline product shipped in drums for water disinfection, pool sanitation, and industrial bleaching applications. Everglory Industrial manufactures and exports premium-grade calcium hypochlorite powder with 65% and 70% minimum available chlorine, produced in granular form (8-30 mesh and 20-40 mesh) and tablet form, packed in UN 2880 certified plastic drums for safe international shipping to over 60 countries. Our ISO 9001 certified facility ensures every batch meets international specifications for chlorine content, moisture control, and particle uniformity, accompanied by a full Certificate of Analysis.

What Is Calcium Hypochlorite Powder?

In the international chemical trade, the term calcium hypochlorite powder is commonly used by buyers to describe the solid, free-flowing granular form of calcium hypochlorite — the chemical compound Ca(OCl)2. While technically the product is manufactured and sold as granules (crystalline particles sized 8-30 mesh), the word "powder" persists in procurement specifications, tender documents, and search queries across many regions and industries. This is because calcium hypochlorite granules, when viewed in bulk, appear as a fine white crystalline solid that many buyers intuitively describe as a powder.

Everglory Industrial supplies calcium hypochlorite powder in its standard commercial form — granular calcium hypochlorite with 65% or 70% available chlorine. This is the form demanded by municipal water treatment plants, swimming pool operators, industrial cooling water systems, and humanitarian water purification programs worldwide. The granular structure provides controlled dissolution, safe handling characteristics, and stable shelf life — properties that a true ultrafine powder would compromise. For buyers who specifically require compressed solid forms, we also offer calcium hypochlorite tablets in 3-inch (200g) and 1-inch (20g) sizes.

Why Source Calcium Hypochlorite Powder from Everglory Industrial?

B2B buyers worldwide choose Everglory Industrial as their calcium hypochlorite powder supplier for six strategic reasons:

Calcium Hypochlorite Powder Specifications

Everglory Industrial produces calcium hypochlorite powder in two chlorine grades and two physical forms — granular and tablet. Each production batch is laboratory-tested and accompanied by a Certificate of Analysis documenting the following parameters:

The 65% grade offers lower moisture content and enhanced stability for long-distance shipping and tropical climates. The 70% grade delivers higher chlorine content per unit weight, reducing freight costs per kilogram of active chlorine. Both grades of calcium hypochlorite powder are available in two granular mesh sizes — 8-30 mesh for faster dissolution.

Applications of Calcium Hypochlorite Powder

Calcium hypochlorite powder is a versatile chlorine source used across multiple industries and applications worldwide:

• Municipal drinking water treatment: Primary or secondary disinfectant for community water supply systems. Dosage typically 2-5 mg/L depending on raw water quality. Provides residual chlorine protection throughout distribution networks.
• Swimming pool and aquatic facilities: Daily sanitation and periodic shock treatment. Granular form dissolves rapidly for immediate chlorine elevation. 70% grade preferred for commercial pools with heavy bather loads.
• Industrial cooling water systems: Biocide treatment for cooling towers, condensers, and heat exchangers. Controls Legionella bacteria, biofilm formation, and microbial-induced corrosion in recirculating water systems.
• Wastewater treatment: Chlorination of treated effluent before discharge. Oxidizes residual organic matter, ammonia compounds, and pathogenic microorganisms to meet environmental discharge standards.
• Aquaculture and fisheries: Disinfection of fish and shrimp farming ponds, hatchery tanks, and processing equipment. Controls bacterial and viral pathogens in aquaculture water systems.
• Emergency and humanitarian water purification: Rapid-response water disinfection for NGOs, UN agencies, and disaster relief organizations. Calcium hypochlorite powder is a WHO-recommended water treatment chemical for emergency situations where liquid chlorine is unavailable.

Granular vs Tablet — Which Form Do You Need?

When buyers search for calcium hypochlorite powder, they are typically looking for the granular form. However, understanding the differences between granular and tablet forms helps buyers make the right procurement decision:

Many B2B buyers order both forms — granular calcium hypochlorite powder for shock treatment and rapid disinfection, and tablets for continuous slow-release sanitization. Both forms are available in 65% and 70% chlorine grades and ship in UN 2880 certified drums.

Packaging and Storage

Calcium hypochlorite powder is classified as UN 2880 (Class 5.1 Oxidizer) and requires certified dangerous goods packaging for international transport. Everglory Industrial packs every shipment exclusively in UN 2880 certified plastic drums with inner PE liners, ensuring full compliance with IMDG code for maritime shipping:

Store calcium hypochlorite powder in the original sealed drum in a cool, dry, well-ventilated area away from direct sunlight, heat sources, acids, ammonia, and combustible organic materials. Never store near other chlorine products or reducing agents. Do not stack drums more than three layers high. Under proper storage conditions, shelf life is 24 months from the manufacturing date. Reseal the drum tightly after each use to prevent moisture absorption, which can cause product degradation, chlorine loss, and potential thermal decomposition.

Quality Assurance and Certification

Every shipment of calcium hypochlorite powder from Everglory Industrial is backed by comprehensive quality documentation:

• Certificate of Analysis (COA): Laboratory-verified results for available chlorine, moisture, water insolubles, and particle size distribution for every production batch
• Material Safety Data Sheet (MSDS): Updated safety documentation in English, provided with every shipment for customs clearance and regulatory compliance
• UN 2880 Packaging Certificate: Dangerous goods packaging certification confirming drums meet IMDG code requirements for maritime transport of Class 5.1 oxidizers
• Certificate of Origin: Chamber of Commerce authenticated origin certificate for preferential tariff treatment and import documentation
• ISO 9001 Certificate: Quality management system certification confirming consistent production standards and traceability

Third-party pre-shipment inspection by SGS, Intertek, or Bureau Veritas is available upon buyer request. Sample orders of 100-500g can be arranged for laboratory evaluation before bulk purchase commitment.

Frequently Asked Questions