Eko alumbre en polvo alum lumps
It is an astringent and antiseptic powder, also used as a styptic to aid with minor scrapes and cuts.
It can be used as an astringent for checking the slight bleeding resulting from small skin abrasions and cuts.
Alum works as a deodorant because Alum inhibits bacterial growth.
This fits the definition of an antibacterial agent.
Styptic pencils or Alum powder or crystals can be applied to cuts that have a mild infection.