Nitro?
Like. As in. Like. Nitroglycerin? The, uh, main ingredient in dynamite?
Yeah. I wouldn’t use that.
Jokes aside, a quick search suggests “nitro” just means enameled cast iron. Which, I use staub enameled coquette (oval chicken roaster) and it’s beautiful; but I wouldn’t trust marketing that’s “Nitro️ enamel” or something, particularly if they won’t tell you what it is, precisely.
(Similar to how Greenpan won’t say what’s in their not-actually-ceramic)