Barbicide

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 by Maurice King and marketed heavily around the United States by his brother James.

[1] Barbicide is a United States Environmental Protection Agency–approved combination germicide, pseudomonacide, fungicide, and a viricide effective against HIV-1, hepatitis B, and hepatitis C. Its active ingredient is alkyl dimethyl benzyl ammonium chloride (5.12% by volume); sodium nitrite and blue dye are also present.

[2] Barbicide is sold as a concentrate diluted for use in a ratio of 2 ounces (57 g) of Barbicide concentrate mixed into 32 ounces (910 g) of water,[3] with each stylist having a container for treating their own tools.

[1] A jar of Barbicide sits on display in the Smithsonian Institution's National Museum of American History.