Can I use chicken brine as a base to make a broth? I just brined 2 chickens which I am about to roast.  Once the roast dinner is over, I anticipate there will be some chicken and carcass left-overs which I will boil in a pot of water to make a broth, and then probably chicken soup.

Can I reuse the brine that the raw chickens soaked in to boil the left-over chicken carcasses in?


Is this safe? (I assume so, since everything ends up boiled)
Will this be tasty?  I anticipate the brine is quite salty, so will need watering down some.
Are there any off-flavours that come off the chicken during brining that I would want to discard?
Tasty and quite salty, YES, (the taste will be salt!) with need to water down are probably GROSS understatements. You gain nothing trying to save/reuse it. Discard it! It will have very little flavor besides salt and very few, if any nutrients.