The non-metal used in the purple coloured solution applied on wounds as antiseptic is

Tincture of iodine is a solution of iodine in alcohol, which appears purple/brown in color and is commonly applied on wounds as an antiseptic. Iodine kills bacteria and prevents infection. Chlorine is used to disinfect water, bromine is not commonly used as antiseptic on wounds, and sulphur is used in some skin ointments but not as a purple antiseptic solution.