Final answer:
Hydrogen peroxide (H₂O₂) is the peroxygen widely used as a household disinfectant due to its inexpensive nature and ability to break down into water and oxygen gas.
Step-by-step explanation:
Hydrogen peroxide (H₂O₂) is the peroxygen that is widely used as a household disinfectant. It is inexpensive and breaks down into water and oxygen gas, making it environmentally safe. Hydrogen peroxide solutions are often used as skin antiseptics and can be found in contact lens cleaners as well.