This article is from the Piercing FAQ, by Anne Greenblatt with numerous contributions by others.
Antiseptics and disinfectants are chemicals designed to kill and
inhibit the growth of microorganisms. Unless specified, antiseptic and
disinfectant products do not contain surfactants that help remove
foreign materials and thusly do not function as skin cleansers.
BENZALKONIUM CHLORIDE AND BENZETHONIUM CHLORIDE SOLUTIONS
Brand names Bactine, No More Ouchies, Pierced Ear Care Solution,
Sensitive Ears Solution
Containing 0.12% Benzalkonium-chloride or 0.13%
Benzethonium-chloride. Both ingredients are intended to be used for
first-aid antisepsis and not for prolonged use. Prolonged use has
been associated with dry or flaking skin. If these symptoms occur
Do not dilute; diluting with water will decrease efficacy and may
contaminate the solution bacteria.
Some products contain isopropyl alcohol which is very irritating and
drying. Brand names Bactine and No More Ouchies contain lidocaine
which can cause irritation.