Disinfectant solution based on sodium hypochlorite, and process for preparing it

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The invention claimed is:

1. A sodium hypochlorite disinfectant solution, comprising: 0.021 to 5.76% (w/v) of sodium hypochlorite, from 0.015 to 4% (w/v) of sodium chloride, and water; whereinthe solution is buffer-free and contains no more than 2% of sodium chlorate relative to the sodium hypochlorite; and wherein the solution has a pH that ranges from 10.1 to 10.7.

2. The solution according to claim 1, wherein the sodium hypochlorite ranges from 0.52% to 2.09% (w/v).

3. The solution according to claim 1 or claim 2, wherein the pH is between 10.1 and 10.5.

4. The solution according to claim 1 or claim 2, further comprising a colorant.

5. The solution according to claim 3, further comprising a colorant.

6. A process for preparing the sodium hypochlorite disinfectant solution as claimed in claim 1, which comprises: diluting a concentrated sodium hypochlorite solution to obtain a dilute sodium hypochlorite solution and adding dilute hydrochloricacid to the dilute sodium hypochlorite solution to obtain the sodium hypochlorite disinfectant solution having a pH between 10.1 and 10.7.

7. The process according to claim 6, wherein the concentrated hypochlorite solution has a pH of 13 and comprises from 15.70 to 20.93% (w/v) of sodium hypochlorite.

8. The process according to claim 6 or claim 7, wherein the dilute hydrochloric acid solution comprises 0.01 1 mol/liter of hydrochloric acid.