I opened a can two nights ago and put the unused portion in a plastic container in the refrigerator. Is it still good to use tonight? Thanks!
Yes. About three days is a good rule of thumb. The USDA says 3-4 days for chicken broth.
It should keep for a week in the refrigerator, but after 3 days I always boil it before using to be safe.
You can always freeze it. I make large amounts at a time and freeze them in usable portions. It can be kept this way for quite a long time.