What hazard is produced when R-22 or R-12 is exposed to an open flame?

What hazard is produced when R-22 or R-12 is exposed to an open flame?

• A. Oxygen
• B. Toxic vapor
• C. Water vapor
• D. Carbon dioxide

Answer: (B)

When halogenated refrigerants like R‑22 or R‑12 are exposed to an open flame, they don’t burn cleanly. The heat causes them to decompose and release hazardous vapors. The decomposition products can include toxic gases such as hydrogen chloride and, under some conditions, phosgene. These toxic vapors pose serious health risks if inhaled, especially in confined areas. Oxygen, water vapor, and carbon dioxide are not the primary hazards produced in this scenario—the dangerous factor is the toxic vapor produced by burning the refrigerants.

When halogenated refrigerants like R‑22 or R‑12 are exposed to an open flame, they don’t burn cleanly. The heat causes them to decompose and release hazardous vapors. The decomposition products can include toxic gases such as hydrogen chloride and, under some conditions, phosgene. These toxic vapors pose serious health risks if inhaled, especially in confined areas. Oxygen, water vapor, and carbon dioxide are not the primary hazards produced in this scenario—the dangerous factor is the toxic vapor produced by burning the refrigerants.