Baradium-357, also known by miners as "Naughty Baby", was a chemical isotope compound of the explosive baradium. It was invented at Calcoraan Depot. Significantly more powerful than baradium bisulfate, and was kept in canisters with an outer shell of an unknown toxic coolant to which, if exposed, would produce violent irrational psychotic impulses in the exposed being. For this reason, people who transported such an explosive were required to wear hazmat suits.
Count Vidian had a massive storage of 357 in Calcoraan Depot, which he intended to use to destroy Cynda with a falsified plan to harvest the moon's thorilide-rich core. However, his plan was thwarted by Kanan Jarrus and Hera Syndulla, as well as Imperial Captain Rae Sloane.
- A New Dawn (First appearance)