Refrigerants CFC-12, CFC-11, and HFC-134a are categorized as which safety class?

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Multiple Choice

Refrigerants CFC-12, CFC-11, and HFC-134a are categorized as which safety class?

Refrigerants are classified for safety using a two-part code that combines toxicity and flammability. The letter indicates toxicity: A for lower toxicity, B for higher toxicity. The number indicates flammability: 1 for nonflammable, 2 for flammable. The refrigerants listed (CFC-12, CFC-11, and HFC-134a) are nonflammable and have low acute toxicity, so they fit the A1 category. That’s why the correct safety class is A1. The other classes would imply either flammability or higher toxicity, which these substances do not have.

Refrigerants are classified for safety using a two-part code that combines toxicity and flammability. The letter indicates toxicity: A for lower toxicity, B for higher toxicity. The number indicates flammability: 1 for nonflammable, 2 for flammable. The refrigerants listed (CFC-12, CFC-11, and HFC-134a) are nonflammable and have low acute toxicity, so they fit the A1 category. That’s why the correct safety class is A1. The other classes would imply either flammability or higher toxicity, which these substances do not have.

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