Is it ok to have a small amout of safrole in your ketone"
A small amount will not do any harm, but, what do you define a small amount as? a couple of ml of a few.
it all depend on whether you are a stickler for purity?
As someone else mentioned distill to purify. you could perhaps re-distil to obtain a better fraction of purity. Once again it depends on what you are trying to acheive..."
obviously PURER the BETTER
all the best