What type of materials are included in class 9?

Class 9 materials, as defined by the Department of Transportation (DOT) and international regulations for the transport of hazardous materials, encompass Miscellaneous Hazardous Materials. This category is used for substances that do not fit neatly into the other hazardous material classes but still may pose a risk during transportation. Such materials can include materials that are environmentally hazardous or those that may cause other risks but are not classified under the traditional categories like explosives, flammable solids, toxic substances, or corrosives.

These miscellaneous materials are important to recognize because they can include items that might be overlooked due to their ambiguous classification. While other classes, such as oxidizers, flammable solids, or corrosives, have specific definitions and characteristics, class 9 serves to ensure that any material that may pose a danger during transport is properly identified and handled, even if it does not fit the standard categories of hazards that are defined by the other classes.