A chemical disinfectant (CHLORINE, ALKALI, ALKALINE-ALCOHOL-AMINE…) can only selectively kill one or similar types of pathogenic microorganisms.
Its processing time is long, ranging from 0.5-1 hour due to the low chemical reaction rate and very high lethal dosage value. They involve serious secondary contamination.
Its lethal processing is limited to the surface of objects, making it impossible to apply in large air spaces.