It appears there is a concern with the Canadian Government with "over" exposure to boric acid. There are no level indicated???
http://healthycanadians.gc.ca/recall...59514a-eng.php

They list it for pest control but then list it again for pool chemicals/craft etc here...

http://www.healthycanadians.gc.ca/pr...orique-eng.php

My wife is an ECE teacher and they are looking at what products contain borates and are eliminating them for crafts

Would this be an issue?

The big question is what is the concern for children and pregnant women?