How is bleaching powder manufactured and stored safely

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Detailed Solution

Bleaching powder is produced industrially through the Hasenclever process by passing chlorine gas over dry slaked lime (Ca(OH)₂).

Manufacturing Process

Reaction:
Ca(OH)₂ + Cl₂ → Ca(OCl)₂ + H₂O
Conditions: The reaction is carried out in a chlorinator chamber under controlled humidity to ensure maximum absorption of chlorine.
Drying & Packaging: The product is dried, sieved, and packed in moisture-proof containers to maintain stability.

Safe Storage Practices

Store in airtight containers made of glass, plastic, or corrosion-resistant materials.
Keep in a cool, dry, and ventilated area away from direct sunlight and organic materials.
Avoid contact with acids, as this releases toxic chlorine gas.
Follow hazard labeling and PPE standards during handling (gloves, mask, goggles).

Note: Bleaching powder decomposes over time; thus, it should be used within 3–6 months of manufacture for full strength.

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