What are common uses of ODS?

• A. Refrigeration, air conditioning, aerosols
• B. Fuel combustion
• C. Pharmaceutical production
• D. Water treatment

Answer: (A)

ODS were valued for their stability and effectiveness as coolants and spray propellants, which is why they were widely used in refrigeration and air conditioning systems as refrigerants, and in aerosol products as propellants. In refrigerators and air conditioners, these substances circulated as refrigerants that absorb heat when they vaporize and release heat when they condense, enabling efficient cooling. In aerosol products, they provided the reliable pressure needed to dispense liquids as fine sprays. While there were other applications, the most common and impactful uses of ODS were in cooling technologies and in sprays, which is why those areas top the list. Because of their ozone-depleting potential, these substances have been phased out or replaced with safer alternatives, but understanding these uses explains why regulation targeted them.