The best replacement for boric acid is borax.

The best alternatives to boric acid are rated as following:
★★★★★  borax
★★★  diatomaceous earth
★★  orthoboric acid
★  sodium borate
★  boron
★  roaches
★  borax ants
★  borate
  fipronil
  boric acid
  borax powder
  delta dust

Your alternative for boric acid is not listed? Suggest!
Speaking about boric acid, one probably shouldn't forget about propylene glycol.

Other search terms related to boric acid and their ratings are:
★★★★★ propylene glycol
★★★ mannitol
★★★ glycerol
★ methyl red indicator
You have in mind a companion for boric acid and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of boric acid in all years. Click on graph for more.
boric acid
borax
diatomaceous earth