Human hair is composed primarily of keratin, a fibrous structural protein. Keratin is distinct due to its high sulfur content, attributed to the amino acid cysteine.

Sodium hypochlorite (NaOCl) is a strong oxidizing agent. When introduced to water, it forms hypochlorous acid (HOCl), a potent oxidizer. The interaction between bleach and hair involves the oxidation of the sulfur-containing amino acids.

For organic clogs like hair in shower or sink drains, household bleach can be a cost-effective alternative to bottled drain cleaners. You can find various bleach products at retailers like Target and Walmart.

: Bleach is corrosive to metal; always rinse metal drain covers with a little water immediately after pouring to prevent damage.

Despite its chemical ability to dissolve hair, many professionals advise against using bleach as a primary unclogger. Bleach Dissolves Hair in Drains! | L-Si Episode #1

Hair is slightly acidic, while bleach is highly basic. When they interact, the bleach initiates a chemical reaction that breaks the hair fibers down into a fluid-like salt and water mixture.

Yes, bleach can dissolve hair, but it is rarely the most effective or safest way to clear a serious plumbing blockage. While household bleach contains sodium hypochlorite—a base that can break down the acidic proteins (keratin) in hair—the process is slow and carries significant risks to your health and plumbing. How Bleach Dissolves Hair