What are you planing to use the gold for ?
It should be fine is you plan to use it as developer(2) or toner (1)
i will be more carefull about using it on PT/PL printing, otherwise it should be fine
I use it as developer or in PT/PL in the emultion mix and as a developer on Chrysotype the solution leftovers from developing are recycle as toner with not problems just dont shake it or you could filter it usng a paper coffe filter.
Where did you get it from? do you have alot?