Which class of fires is Monoammonium phosphate primarily designed to combat?

Monoammonium phosphate is primarily designed to combat Class A, B, and C fires effectively. Class A fires involve ordinary combustible materials such as wood, cloth, paper, and some plastics. It can also be used on Class B fires, which pertain to flammable liquids and gases, as well as Class C fires that involve energized electrical equipment. This versatility makes monoammonium phosphate a key component of multi-purpose dry chemical fire extinguishers.

While the choice indicating that it combats all classes of fires suggests that it could address every fire scenario, it's important to note that there are specific limitations. For example, monoammonium phosphate is not used for Class D fires, which involve combustible metals. Thus, while it is effective across a wide range of fire classes, it is not universally applicable to all situations. Understanding the classifications of fire and the appropriate extinguishing agents is crucial for effective fire safety and response.