What class of fire extinguisher is recommended for a fire in a chemical cabinet?

The recommended class of fire extinguisher for a fire in a chemical cabinet is Class B. This is because Class B extinguishers are specifically designed to extinguish fires that involve flammable liquids and gases, which are likely to be present in a chemical cabinet. These fires may originate from substances such as solvents, greases, and petroleum-based products commonly stored in such environments.

Class A extinguishers are intended for ordinary combustibles like wood and paper, and Class C extinguishers are meant for electrical fires. Class D extinguishers are designed for combustible metals and are not suitable for incidents involving flammable liquids. Therefore, in the context of a chemical fire scenario, using a Class B extinguisher is essential for effectively addressing the situation while ensuring safety.