How long are FP-100C negatives good for?

I have a stack of FP100C negatives that I exposed almost 10 years ago now. I kept the negatives because I have bleached them in the past and scanned them. They've been in climate controlled storage, they've been in uncontrolled storage, and they've been in a box since at least 2012 if not before. Would they still be good to bleach? Or would the prolonged storage have an effect on the emulsion/chemicals that's crystalized on them?

I heard the fresher the negative, the better. But the only way you're going to find out is to try it.

Jim B.