As far as I can tell, this document lists details of a commercial product that is 13% copper sulphate pentahydrate by weight. pH is 2.4 (more concentrated than what you were looking at?). Viscocity is listed as 15 cps @ 15 degrees (Celsius?). I don't know what those units are, but I assume they're what you're looking for?
click me!
The stuff's reasonably environmentally friendly (used as fertilizer) and google tells me it's a good biocide.
edit: Only off by ten to the third on a number I mentioned.

edit, the sequel:
it's cheap on ebay, if anyone wants some.