How Does Caustic Soda Unblock Drains -

The drain was silent. And clear.

She remembered the white granules under the sink: caustic soda, also known as sodium hydroxide. Her grandmother swore by it, but Marta had always been scared of the warning label:

The moment the cold water hit the granules, the magic—and the danger—began. how does caustic soda unblock drains

The clog didn’t just get pushed down the pipe. It dissolved . The solid fat became liquid soap. The hair, weakened by the violent heat, crumbled into mush.

She poured a cup of the tiny white beads directly into the drain. They looked harmless, like coarse salt. Then, very carefully, she measured a cup of cold water. Not hot, she reminded herself. Never hot. The drain was silent

But caustic soda is a base with a pH of 14. It is a master of . The hydroxide ions from the soda attacked the fat molecules like a pair of molecular scissors. They sliced the big, stubborn grease into two smaller, water-soluble parts: glycerol (a soap-soft liquid) and fatty acid salts (which are, literally, soap).

Marta stared at the standing water in her kitchen sink. It had been an hour since she’d washed the greasy roasting pan, and the water still hadn’t drained. The faint, rotten-egg smell told her it wasn’t a simple clog—it was sludge. Her grandmother swore by it, but Marta had

A fierce chemical reaction erupted. The water instantly began to hiss and bubble like a witch’s cauldron. The porcelain sink grew hot to the touch. Marta stepped back as a wisp of steam rose from the drain.