73% Calcium Hypochlorite

73% Calcium Hypochlorite refers to a high-purity grade of calcium hypochlorite (Ca(ClO)₂), a strong oxidizing agent widely used as a disinfectant, sanitizer, and bleaching agent, especially in water treatment.

🧪 Basic Information

Property	Description
Chemical name	Calcium hypochlorite
Chemical formula	Ca(ClO)₂
Available chlorine	73% (by weight) – High-purity grade
Appearance	White or grayish-white granules or tablets
Odor	Strong chlorine-like smell
Solubility in water	Moderate (~21 g/L at 25 °C)
Stability	Decomposes slowly in moist air
CAS number	7778-54-3

💧 Main Applications

1. Water Disinfection
   • Municipal drinking water
   • Swimming pools
   • Well water and emergency water treatment
2. Sanitation & Hygiene
   • Surface and equipment disinfection
   • Hospital and food industry sanitizers
3. Bleaching Agent
   • Pulp, paper, and textile industries
4. Oxidizing Agent
   • Industrial chemical processes
   • Organic synthesis (limited)

⚠️ Handling and Safety

• Highly reactive oxidizer — avoid contact with organic materials, acids, and ammonia
• Corrosive — can cause burns to skin, eyes, and respiratory tract
• Store in a cool, dry, well-ventilated area
• Incompatible with flammables, reducing agents, and moisture

🧪 Chlorine Release Reaction in Water

Ca(ClO)2+2H2O→2HOCl+Ca(OH)2\text{Ca(ClO)}_2 + 2H_2O \rightarrow 2HOCl + Ca(OH)_2Ca(ClO)2​+2H2​O→2HOCl+Ca(OH)2​

• HOCl (hypochlorous acid) is the active disinfectant
• Works best at pH 6–7.5 for maximum efficacy

📦 Typical Product Formats

• Granules and powder (for bulk disinfection)
• Tablets (for swimming pools and water tanks)
• Often sold in 25 kg drums or plastic pails

✅ Advantages of 73% Grade

• High efficiency: More chlorine per unit weight
• Longer shelf life (if stored properly)
• Lower dosage needed compared to diluted hypochlorites (like bleach)