2025 ASCP Histotechnologist Complete Practice Test

The yellow section of the NFPA label indicates the reactivity of a chemical. This section uses a numerical scale from 0 to 4, with 0 representing stable materials that pose no significant risk of reactivity and 4 indicating materials that can explode or undergo violent reactions under specific conditions. Understanding the reactivity is crucial for safe handling and storage of hazardous materials, as it informs users about the potential dangers associated with chemical interactions.

The other sections of the NFPA label serve different purposes: the blue section is related to health hazards, the red section addresses flammability, and the white section provides specific information about the material, such as the presence of corrosives or radiation hazards. Each section plays a vital role in conveying different safety information, but the yellow section is specifically tailored to reactivity concerns.