How to tell if solder has zinc

[tinhorn97062]

I was given a pretty good size roll of solder wire by a coworker. The problem is that he's unsure if it was 95/5 or 50/50 or whathaveyou, and there's no label on it anymore. Is there any easy way to tell if this stuff has zinc in it?

[rancher1913]

as far as I know you don't have to worry about zinc in solder.

[LAGS]

They never have put Zinc in solder.
But if the stiff is shiny silvery, then it would be Lead free Solder.
If it is a Gray color, then it is Lead bases solder and probably 50/50

[tinhorn97062]

Thanks for the information, gentlemen. :-)