Why we need to dilute bleach before use as a disinfectant?

Is full strength bleach solution not effective as a desinfectant?

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SW-User

The ideal concentration is 0.12%. Straight from the bottle is 2-10%. The recommended dilution has the same disinfecting power but is less risk to your eyes, skin and lungs.

JustGoneNow

@SW-User you can even go as high as 20% to 80% water without it being so dangerous but yeah, quite effective at even a tenth of that.