What is the term for hazardous materials mailed within the US?

The correct term for hazardous materials mailed within the US is HAZMAT. This designation refers specifically to materials that are classified as hazardous by regulatory agencies due to their potential to pose a risk to health, safety, property, or the environment. The HAZMAT classification encompasses a wide range of substances, including chemicals, explosives, and biological agents, all of which require careful handling and transport following strict guidelines to ensure safety during shipping and delivery.

While "Dangerous Goods," "Regulated Materials," and "Restricted Items" may seem similar and might even be used interchangeably in casual contexts, they are not the specific terms used in postal regulations for hazardous materials. "Dangerous Goods" is often viewed in the context of international shipping rather than specifically U.S. regulations. "Regulated Materials" could refer to various types of items that are controlled for different reasons, which does not specifically pertain to hazardous materials in the postal system. "Restricted Items" generally refers to items that are not allowed to be shipped or have limitations, but this does not strictly define hazardous materials either.

In summary, HAZMAT is the precise terminology used to identify and categorize hazardous materials in the context of mailing within the U.S., highlighting the importance of adhering to postal