92% pure South Korean silver solder

As part of my studies (around 2006) I travelled to South Korea.
while there I bought some 10g sheets of solder.

Over the years the easy, medium and hard solders are long gone but i
still have the 92% solder.

I found it the other day and I just wondered if anyone knew of any
use for it. my guess is its used for soldering fine silver and my
fear is the 8% balance is mainly cadmium to lower to melting point.

As a side note, it cost about $3 but this was when silver was a
cheap precious metal.

All the Best,
Chris Boland