Pressurized tank cars usually carry:

Pressurized tank cars are designed to transport a variety of substances, including both flammable and nonflammable gases, as well as toxic materials. This versatility allows them to carry a more extensive range of chemicals necessary for various industrial applications. In hazardous materials operations, it's essential to acknowledge that not all substances that pressurized tank cars carry are inherently safe; thus, understanding the nature of the contents—be they flammable, nonflammable, or toxic—is crucial for emergency response planning and safety measures.

Nonflammable gases can be transported safely in these cars, but so can flammable gases, which require stringent safety protocols due to their potential for ignition and explosion. The inclusion of poisons reflects the need for caution with different types of hazardous materials and the importance of proper identification and handling during emergencies. Consequently, the recognition of these categories of substances helps prepare responders for the specific dangers associated with each type, facilitating an effective response in an emergency situation.