I don't know about the side effects
but if you really want to use that stuff instead of dumping it down the drain:

you could use it during your pool closing ( who cares if you get foam then?)

you could run around to all the bird baths in town & use a eye-dropper full

you could sell it at a fleamarket or yard sale

you could give it away

you could mix it with water & spray your house roof or shed roof
( to get rid of growths from tree debris)