2. There are many kinds of disinfectant, among which 84 disinfectant is iodophor for injection, and alcohol has the worst effect. 84 disinfectant is generally used to disinfect clothes, tableware and environmental objects, with good effect, but it has a strong taste and is irritating to some extent, so it is not suitable for skin disinfection.

3. Iodophor is generally used to disinfect the skin at the injection site, which has the advantages of quick sterilization, lasting effect and high cost. It is not suitable for the disinfection of environmental objects. Alcohol is cheap and has moderate effect, but it is widely available, colorless, non-toxic and pollution-free.