Keep windows open to ensure good ventilation
Use protective gear, such as masks, gloves and goggles
Use cold water to dilute bleach
Use a measuring jug to measure accurately the volume of bleach required
For household bleach containing 5.25% sodium hypochlorite, the methods of dilution are as follows:
For general environmental cleaning, use 1 in 99 diluted household bleach, that is, 10ml of household bleach into 990ml of water
Concentration 500 ppm
For cleaning surfaces or articles contaminated with vomitus, excreta or secretions, use 1 in 49 diluted household bleach, that is, 10ml of household bleach into 490ml of water
Concentration 1000 ppm
For cleaning surfaces or articles contaminated with blood spillage, use 1 in 4 diluted household bleach, that is, 10ml of household bleach into 40ml of water
Concentration 10000 ppm
Points to note while using diluted household bleach
Avoid using bleach on metals, wool, nylon, silk, dyed fabric and painted surfaces.
Don¡¦t touch the eyes. If bleach has spilled into the eyes, rinse with water immediately for at least 15 minutes and consult a doctor promptly.
Since chemical reaction may lead to accident, bleach must not be used together or mixed with other household detergents
Besides, bleach should be stored in a cool and shaded place and out of reach of children.
The active ingredient of bleach decomposes as time goes by. Hence, it is advisable to buy recently made bleach and avoid over-stocking
Diluted bleach should be used within 24 hours after preparation.