The best replacement for tear gas is pepper spray.

The best alternatives to tear gas are rated as following:
★★★★★  pepper spray
★★  oc
★★  mace
★  mustard gas
★  oc spray
★  hot tear gas
  cs gas

Your alternative for tear gas is not listed? Suggest!
Speaking about tear gas, one probably shouldn't forget about mase.

Other search terms related to tear gas and their ratings are:
★★★★★ mase
You have in mind a companion for tear gas and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of tear gas in all years. Click on graph for more.
tear gas
pepper spray
oc