NaOH unclogs the drains?

Question

how does drain cleaners work in terms of NaOH? and what metal particles are in the drain cleaners?

Answer 1

Drains are often full of human hair and the like. These substances are slightly acidic. So it makes sense that a drain cleaner will work by using an alkaline such as NaOH. It neutralizes the clog and makes it easier to dissolve.