Which of the following is NOT a category of hazardous chemicals?

The correct choice reflects that "Electrical Hazard" is not officially recognized as a category of hazardous chemicals by OSHA. In workplace safety context, hazardous chemicals are classified into specific categories that focus on their physical and health-related risks.

Physical Hazards include substances that may present risks due to their physical state or behavior, such as flammables, explosives, and reactive materials. Health Hazards cover chemicals that can cause health issues, including carcinogens, respiratory sensitizers, and other substances that may result in significant health impacts when exposed to workers.

Combustible dust is also considered a hazardous substance, as it can create explosive conditions when suspended in the air.

By contrast, while electrical hazards can pose serious risks in the workplace, they do not fit into the classification of hazardous chemicals; rather, they pertain to electrical safety and equipment. Hence, recognizing the formal categories helps ensure compliance with OSHA regulations and enhances workplace safety protocols.