What kind of materials does NFPA 704 classify?

NFPA 704 specifically classifies hazardous materials for emergency response. This system, developed by the National Fire Protection Association, uses a color-coded diamond symbol to convey information about the health, flammability, reactivity, and specific hazards of materials. The primary aim is to enhance safety by ensuring that first responders can quickly assess the risks associated with a material in an emergency situation.

The classification focuses on the hazards that a material may present in terms of its potential impact on health and the environment, facilitating better decision-making during incidents involving spills, leaks, or fires involving these materials. The three other choices do not encompass the primary purpose of the NFPA 704 system. Thus, option B reflects the comprehensive and emergency-oriented nature of the NFPA 704 classification, which is designed to enhance safety in emergency response scenarios involving hazardous substances.