Short or long time to work
How long it takes to penetrate an organism to kill it/ how long to penetrate an object
Most chemicals have to be prepared in a very precise manner/ too dilute or too much is not necessarily a good thing - too concentrated can adversely affect - Preparation - temperature
Odor - phenol can be very irritating, lysol, formaldehyde.
Microbe range - types of MOS and their sensitivity - not all chemicals affect all MOs in the same way - some more effective than others etc
Specific application - type of object or surface to treat/environment - living vs inanimate
Presence of biological/organic material - plant material, food, body fluids - blood, urine, sputum, vomit, feces, semen, vaginal secretions
How active is the MO - dormant spore, etc. Less active is harder to destroy