Under the Globally Harmonized System (GHS), hazardous materials are classified based on what criteria?

The classification of hazardous materials under the Globally Harmonized System (GHS) is primarily based on specific categories that assess the materials according to their physical, health, and environmental hazards. This criteria enables consistent communication and understanding of hazards associated with chemicals and ensures that they are handled safely.

By categorizing materials in this manner, the GHS aims to enhance safety in the workplace and during transportation, while also informing users about the potential risks. For instance, physical hazards may include flammability or explosiveness, health hazards may involve toxicity or irritability, and environmental hazards might encompass risks to aquatic life. This systematic approach helps provide clear guidelines for classifying and labeling hazardous materials, promoting safer practices and compliance globally.

In contrast, the other options mentioned do not align with the GHS framework; they focus on aspects like economic factors, logistics, or past practices, which are not relevant in the context of hazard classification.