Which chemical is often used to clear clogged drains?

Sodium hydroxide, also known as lye or caustic soda, is frequently used to clear clogged drains due to its effectiveness in breaking down organic matter. It is a highly alkaline substance that can react with fats, grease, and protein-based blockages, effectively dissolving them and allowing water to flow freely through the drainage system. The strong caustic nature of sodium hydroxide makes it a powerful agent for clearing tough clogs compared to other substances.

Vinegar, while sometimes used in combination with baking soda for light clogs, lacks the caustic strength needed for more severe blockages. Chlorine bleach is a disinfectant and is not designed for clearing clogs, as it primarily works by killing bacteria and does not dissolve organic materials effectively. Hydrochloric acid is a strong acid used for various applications, but it can be overly corrosive and dangerous to use in household plumbing, potentially damaging pipes and requiring careful handling. This makes sodium hydroxide the preferred choice for effectively and safely managing clogged drains.