| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | formaldehyde | Korea | Less commonly encountered in household products, but may be used in industrial applications and laboratories | 1 |
| 2 | formaldehyde | South Korea | Often associated with preserving biological specimens and used in cosmetic products. | 1 |
| 3 | hydrogen peroxide | Korea | Used for hair bleaching and disinfecting contact lenses | 1 |