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At this slightly acidic and skin-compatible pH, the solution is mild & safe to the skin and less corrosive compare to commonly available chlorine-based disinfectant. Hence causes less occupational hazard.
In solution, NaDCC releases free and combined available chlorine in 50:50 equilibrium whereby each molecule of NaDCC yield 2 molecules of Hypochlrous acid (HOCl). As part of the free chlorine is used up (due to reaction with microorganisms/organic matters), part of the combined available chlorine is freed to restore the 50:50 equilibrium and continue the disinfecting process. This act as a reserve killing power that continues to be made available even after contact with organic soils. This explains why NaDCC solution is stable and will not lose its efficacy in short period of time.
The antimicrobial activity of NaDCC is due to chlorination of cell protein/ enzyme system by free HOCl, causing hydrolysis of the peptide chains of the microorganisms’ cell membranes. |