Technical index and application of sodium hypochlorite

[Technical Index] GB19106-2003

[Application] Sodium hypochlorite solution is a kind of non-naturally occurring strong oxidant.

(1) Sterilization mechanism

The disinfection mechanism of sodium hypochlorite includes the oxidation of sodium hypochlorite, the role of new ecological oxygen and the chlorination

①The following reaction occurs after sodium hypochlorite is hydrolyzed in the solution:

Cl ⁺ + 2E → cl ^-

The CIO ^- + 2E + 2H ⁺ → CI ^- + H ₂ O

When hypochlorite ion is reduced, it is easy to obtain electrons and has strong oxidizing property.

②The role of nascent oxygen The new ecological oxygen formed by the decomposition of hypochlorous acid oxidizes bacterial protein

③The chlorine contained in the chlorination disinfectant causes chlorination to the bacterial protein

(2) Application of sodium hypochlorite in sterilization, disinfection, etc.

Sodium hypochlorite can be used to disinfect water and inhibit the growth of algae in the water.

①In the water treatment and sterilization industry, sodium hypochlorite is often formulated into a standard solution with an effective chlorine concentration of 15% and used after being diluted with water.

The swimming pool water can be directly disinfected with sodium hypochlorite, and the chlorination amount is 5-10mg/L to maintain a good disinfection effect

High-concentration sodium hypochlorite has a good peeling effect on slime, but because of its corrosiveness, it must be used in combination with corrosion inhibitors such as chromate or polyphosphoric acid (100mg/L)

When sodium hypochlorite contains 400mg/L of available chlorine, if it acts for 10 minutes, the killing rate of Mycobacterium fortuitum can reach 99.

②Other applications When sodium hypochlorite contains 300mg/L of available chlorine, if it acts for 15 minutes, the logarithmic value of killing poliovirus is >4.