Maurice King, a chemistry teacher, invented Barbicide in 1947 in his Brooklyn apartment. His bathtub was filled with this translucent blue liquid as he mixed in one chemical after the other. ... In fact, Barbicide really meant, “to kill the barber.”
It’s because he had scabs on his scalp, and the barber would hit them with the comb. So hence the name when he invented it. It’s a piece of Americana and is in the Smithsonian!

Liquid used to disinfect

Brand name of sanitizer used to disinfect salon implements.

Brand name of sanitizer used to disinfect salon implements.

Barbicide is a disinfectant solution used by barbers and cosmetologists for disinfecting grooming tools such as combs and hair-cutting shears. Manufactured by King Research, it was invented in 1947 [..]

A sanitizer used to disinfect salon implements.

The brand name of a product used in salons to disinfect hairdressing tools (e.g. combs, rollers, scissors).