A rail car with UN 1017 placards contains what product?

The correct identification of UN 1017 corresponds to chlorine, a chemical that is commonly used in industrial applications, water treatment, and as a disinfectant. Chlorine is a highly reactive and toxic gas that, when transported, is specifically labeled with UN 1017 to indicate its nature and the precautions necessary for handling it.

Understanding the placarding system is essential in hazardous materials control and operations. Each substance identified by a UN number has specific characteristics, hazards, and shipping classifications that need to be recognized by first responders to ensure safety during incidents involving hazardous materials. For example, the placard for chlorine features a yellow background with the regulatory warning for its toxic nature, which alerts responders to its potential hazards.

When recognizing the other options presented, each corresponds to different UN numbers: anhydrous ammonia (UN 1005), sulfuric acid (UN 1830), and gasoline (UN 1203). Each of these substances has distinct characteristics, and understanding their proper identification is critical for effective response in hazardous situations. Thus, the association of UN 1017 with chlorine demonstrates the importance of proper placarding in the safe handling and transportation of dangerous goods.