Finaject shelf life?

[Nighthawkk]

I still have some leftover homebrew that was made 7 months ago, it has just been sitting in a vial in the cabinet. Should I toss it or is it ok to use?

 

[fergie]

I've heard its good for about a year

 

[Nighthawkk]

I've heard its good for about a year

I've open the top every now and then, exposing to air is ok?