My apologies for asking this, but I've used the "HD Google Search" function and could not come up with any definitive answer. This in the only solder I could find locally that I thought might could be used in my Samohon still. It's the Bernzomatic silver bearing lead-free copper solder. I could not find the MSDS, however someone stated in an Amazon.com review that the "MSDS sheet shows it as by weight 1-10% copper, less than 1% silver, and the remainder is tin". Here is the link:
I too didn't want to pay close to $50 US to buy Stay-Brite 8 plus the cost of Harris flux. Instead I just bought a Harris Stay-Brite kit for about $12. It doesn't have quite the percentage of silver as Stay-Brite 8 but it's very close. The kit provided enough solder and flux to solder two stainless steel tri-clover ferrules to my keg boiler still plus a 2" long neck stainless steel ferrule to my 2" copper column with plenty left over. The Stay-Brite kit produced a connection that is very strong and made a nice looking joint even with my less than professional skills. By the way, I don't see any reason to buy all those keg to copper column connections you find on E-Bay. 2" copper type M pipe (2.009" ID) fits sleeves very nicely over a 2" stainless steel ferrule (2.000" OD).
I wonder what's in the Worthington solder that makes it for "non-portable" Water use. I have to assume they mean potable I do agree though that Staybrite 8 is over priced, by today's spot price there is about $14.50 U.S. in silver in a 1 pound roll of Staybrite 8.
I'm only using it for my copper to copper connections. I've had a really difficult time soldering my 2" connections with the solder and torch I had, so I upgraded to a Bernzomatic TS8000 mapp gas torch and bought the new solder Bernzomatic silver bearing solder. Turns out my old solder was 5% antimony, so I've taken it apart and done my best to clean off all the old solder. I also have one of those stay-brite kits that I am going to use when soldering my "spud" into my keg. Wish me luck with my soldering.