Final answer:
The 'Flammable Solid' hazard label refers to a solid material that can easily ignite and sustain combustion. It falls under the 'characteristic hazardous wastes' category, which includes materials that are ignitable and poses associated health and environmental risks, as defined by the NFPA 704 and regulated by the EPA.
Step-by-step explanation:
The hazard label "Flammable Solid" generally refers to c. A solid material which may burn under certain conditions. It indicates that the identified material is a combustible solid that can be easily ignited and sustain combustion. Such materials are further classified by the National Fire Protection Agency (NFPA) 704 Hazard Identification System, which provides a more detailed summary of their hazards, including flammability, reactivity, and health risks, using a diamond-shaped symbol with blue, red, yellow, and white portions that denote different types of hazards. Flammable solids are included among characteristic hazardous wastes, which are defined by properties like ignitability, corrosivity, reactivity, and toxicity. Proper handling of these materials is crucial, as mandated by the Environmental Protection Agency (EPA) hazardous waste management program, to avoid risks to human health and the environment. Characteristic hazardous wastes are materials that are dangerous due to their toxic, corrosive, flammable, or reactive nature, with detailed information provided by the US EPA and summarized in various regulations and guidelines such as Table 22.7.2.