To be fair, most products and practices in the 1950's would be considered wildly dangerous by today's standards. Hell, we were still using leaded gasoline (gasoline with tetraethyllead additive) up until the 90's. Think about how dangerous lead poisoning is and now imagine that we used to add it to gasoline and every gas powered motor was spewing vaporized lead. Good times.

Depends on how much of it they give you, on the flip side with a half-life of 244 days you'd better be using your kit soon after purchase, and better hope it didn't sit on the shelves long.