Overview
Sodium hypochlorite is an inorganic compound with the formula NaClO. It is widely used as a disinfectant and bleaching agent due to its strong oxidizing properties. The compound is typically sold as an aqueous solution, commonly known as liquid bleach, with concentrations ranging from 5% to 15% available chlorine. First produced in 1789 by Claude Louis Berthollet in his laboratory in Javel, France, sodium hypochlorite has since become one of the most important chlorine-based disinfectants. Its effectiveness against a broad spectrum of microorganisms makes it invaluable in both domestic and industrial settings.
Physical and Chemical Properties
Sodium hypochlorite is a greenish-yellow liquid with a characteristic chlorine-like odor. The solution is unstable, decomposing gradually to release chlorine gas, especially when exposed to light or heat. This decomposition is accelerated at higher temperatures and in the presence of certain metals. The compound is a strong oxidizing agent that reacts vigorously with reducing agents and organic materials. It has a pH of approximately 11-13 in solution, making it strongly alkaline. When mixed with acids, it can release toxic chlorine gas, which requires careful handling procedures.
Main Applications
The primary use of sodium hypochlorite is as a disinfectant in water treatment facilities, swimming pools, and hospitals. It effectively kills bacteria, viruses, and other pathogens, making it essential for maintaining public health standards. In household applications, it serves as a bleaching agent for laundry and surface cleaning. Industrial uses include pulp and paper bleaching, food processing equipment sanitation, and odor control in wastewater treatment. The textile industry also utilizes sodium hypochlorite for fabric bleaching and stain removal processes.
Safety and Storage
Proper handling of sodium hypochlorite requires protective equipment including gloves and eye protection due to its corrosive nature. Spills should be neutralized with sodium bisulfite or another reducing agent and cleaned immediately with copious amounts of water. Storage containers should be made of plastic (preferably HDPE) and kept in cool, well-ventilated areas away from direct sunlight. The solution should never be stored near acids or ammonia compounds, as dangerous chemical reactions may occur. Shelf life is typically 3-6 months when stored properly.
B2B Procurement Guide
When procuring sodium hypochlorite commercially, verify the concentration (typically expressed as % available chlorine) to ensure it meets your specific application requirements. Industrial-grade solutions usually contain 10-15% available chlorine, while household bleach is typically 5-6%. Consider transportation regulations, as higher concentrations may have special shipping requirements. Bulk purchases often offer significant cost savings, but evaluate storage capacity and usage rates to prevent degradation of the product. For large-scale water treatment applications, on-site generation systems may be more economical than purchasing pre-made solutions.
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