Which of the following is NOT an example of a Toxic Industrial Chemical (TIC)?

The correct choice is indicated as hydrochloric acid not being classified as a Toxic Industrial Chemical (TIC). Toxic Industrial Chemicals are typically defined as chemicals that are used in industrial processes and can pose significant risks to health and safety if released into the environment.

Anhydrous ammonia, hydrogen cyanide, and chlorine are all commonly recognized as TICs because they are industrial chemicals that can be hazardous in large quantities, causing severe health effects upon exposure. Anhydrous ammonia is used primarily as a fertilizer but can be toxic and corrosive. Hydrogen cyanide is highly toxic and can be used in industrial processes such as the production of plastics and pharmaceuticals. Chlorine, often used in water purification and disinfection processes, is also highly toxic to humans and can cause respiratory damage and other health issues.

Hydrochloric acid, while hazardous, is primarily classified as a strong acid rather than a TIC in the context used here. It does not fit into the typical classification of TICs compared to the other substances listed, focusing more on the level of toxicity and the potential for use in industrial processes that can lead to widespread harm.