The Richgro Ant Killa active ingredient is Bifenthrin. Whilst it’s toxic, it doesn’t fume compared to other ant dust products. I’d use it at the site of the ant next and not around the hive.
There are other alternatives to ant problems.
Look up ‘ant moat’.
Cinnamon is also a natural product that can act as a deterrent. I’m sure others will chime in too.