Not to mention that there was a different-strength HC-110 concentrate sold in Europe that was not nearly as viscous or highly-concentrated as the honey-thick syrup sold in the U.S.
Doremus
That much older version hasn't been produced for some time - I think before the bankruptcy.
The real problem is that post 2018 there appeared to be two versions of HC-110 - one distributed in the EU, and the other produced in the USA.
The EU version said "Made in Germany", and was quite possibly the leftover production from the company related to Tetenal. It was that source that supplied Eastman Kodak prior to the bankruptcy, and then Kodak Alaris until Tetenal went into bankruptcy.
The other, much less viscous version, with a different MSDS, said "Made in the USA" and was less likely to offer extraordinary long life. That was the result of Kodak Alaris' somewhat scrambling attempts to fill the void created by the collapse of Tetenal - as well as move manufacture to the USA.