ah, yes, BrimStuff adds sulfur to the output, making it non-divisable.
however, it is with 50% probabilty, and this made me think that i could hypothetically support such recipes by dividing the probablility (or setting a probabilty if one isn't set) if i can't divide the actual product, but that's something for the future. and it may spaghettify the code, so i'm not sure about that.