The best replacement for bromine is chlorine.

The best alternatives to bromine are rated as following:
★★★★★  chlorine
★★★  bromide
★  chlorine for pool
★  chlorine spa
★  chlorine pool
★  chlorine hot tub
★  iodine
★  salt water pool
★  chlorine swimming pool
★  chlorine spas
★  oxygen more electronegative
★  chlorine in pools
★  chlorine pools
★  chlorine for pools
★  chlorine better leaving group
  chlorine tablets
  baquacil
  chlorine more reactive
  baqua spa
  dramamine
  total bromine
  selenium grid
  baqua
  fluorine more reactive
  fluorine
  nature 2

Your alternative for bromine is not listed? Suggest!
Speaking about bromine, one probably shouldn't forget about toluene.

Other search terms related to bromine and their ratings are:
★★★★★ toluene
★★★★ alkene
★★★★ phenol
★★★★ cyclohexene
★★★★ aromatic hydrocarbons
★★★★ cyclohexane
★★★ benzene
★★★ hexane
★★★ potassium iodide
★★ chlorine
★ ethane
★ ethene
★ acetone
★ alkane
★ carbon tetrachloride
★ ccl4
★ acetylene
★ methane
ozonator
an alkene
You have in mind a companion for bromine and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of bromine in all years. Click on graph for more.
bromine
chlorine
bromide