What class does dry ice belong to in terms of hazardous materials?

Dry ice is classified as a Class 9 hazardous material. This classification is used for miscellaneous dangerous substances and articles that do not fit into the other defined classes and may pose risks during transport. Dry ice, being solid carbon dioxide, can be hazardous due to its ability to sublimate into carbon dioxide gas, which can displace oxygen in an enclosed area, leading to potential asphyxiation hazards.

The classification of dry ice in Class 9 reflects the need for specific handling and transport measures to mitigate the risks associated with its use, especially in confined spaces where gas accumulation may occur. The inclusion of dry ice as a Class 9 material ensures that shippers and transporters are aware of the necessary precautions required for safe handling and storage.

Understanding the classification of dry ice is important to apply the appropriate safety measures and regulatory compliance during transportation. This classification underlines the unique hazards associated with materials that, while not falling into the more immediately life-threatening categories, still require careful management to ensure the safety of all involved.