75% alcohol is used without water. In daily life, you can dampen a towel with 75% alcohol and wipe the desktop, elevator buttons, etc. to disinfect. In medicine, medical equipment is often sterilized by immersion.
75% alcohol can be used directly, water will reduce the concentration of alcohol, weakening the role of disinfection and sterilization.
When using, you can take the spray, wipe method. Because alcohol is flammable and volatile, there are safety hazards when encountering fire or static electricity, so it is not recommended to spray a large amount of air in a confined space or on the body, you can use gauze, cotton balls and other items to carry out localized wipe disinfection.
When using alcohol to disinfect, keep the room ventilated, turn off the fire source, power supply, storage, pay attention to tighten the lid, placed in a cool, ventilated place, avoid children touch.