Maybe I mispoke - I will have to refresh my memory to recall if one of them was nontoxic now because I am starting to get them mixed up. I think it was 4SC that I was looking at ordering but now that I look at it, that one doesn’t appear to be nontoxic.
This was a tough topic to research. Weld-on has two different websites. With the help of others, we finally identified the other site (the one that was not intuitive or easy to find). https://assemblyadhesives.com/
The resource that was found through this research is here:
Hope that helps if you need to figure out what will work best for you! 
The blue box shows the options that will work for cast acrylic pieces (with other cast acrylic pieces).
