| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | perchloric acid | everyday culture in the United States | Perchloric acid is a highly corrosive and hazardous substance that requires careful handling and storage in a laboratory setting, and is not typically encountered in everyday culture in the United States. | 4 |
| 2 | perchloric acid | laboratory settings | Perchloric acid is used as a powerful oxidizing agent in chemical experiments in laboratory settings with strict safety protocols. | 3 |