| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | calcium hypochlorite | Tropical countries | Less commonly used and not widely known in tropical countries | 1 |
| 2 | hypochlorite | tropical countries | Hypochlorite is often used in water treatment processes to disinfect and purify drinking water, especially in areas with limited access to clean water sources. | 1 |