The letter "I" is used to indicate what regarding hazardous materials?

The letter "I" indicates international transportation when it comes to hazardous materials. This designation is crucial because it signals that the materials are being moved across borders, which requires adherence to specific regulations and standards that govern the transport of hazardous substances internationally. These regulations are established to ensure safety, environmental protection, and compliance with various national and international laws.

Understanding this designation is important for those involved in logistics, shipping, and safety management regarding hazardous materials. It informs handlers and transporters that special considerations, such as different labeling, documentation, and risk assessments, must be addressed when dealing with materials that cross international boundaries. This awareness aids in preventing incidents and ensuring that hazardous materials are transported safely and legally.