Ammonia is classified as a refrigerant under which category?

Ammonia is classified as a refrigerant under the B2 category. This classification indicates that ammonia is a refrigerant with a moderate toxicity risk and is not flammable. In this context, B2 specifically denotes refrigerants that have higher toxicity levels compared to the A category but do not present significant flammability risks, placing them in a separate safety classification.

Ammonia, in particular, is widely used in industrial refrigeration applications due to its high efficiency and thermodynamic properties. However, it must be handled with care because of its potential health risks, which is why it is categorized this way.

Other categories, such as A1 or C1, are assigned to refrigerants with different toxicity and flammability characteristics that do not apply to ammonia. This clear categorization helps in the management of safety protocols and regulatory compliance in environments where refrigerants are used.