I went to Wikipedia, and there's no such info. That's the best online source, because the ACS keeps tabs on edits and removes obviously bogus physical and chemical data. A couple of MSDS copies I was able to download also have no info. You best bet is to go to the public library reference desk and look for the CRC or The Condensed Chemical Dictionary. Generally, hydrated ionic salts aren't very soluble in alcohols or other polar organics, although there are exceptions. Usually, if a salt is an exception, 'tho, that's such a useful bit of info, we like to mention it. So I'd guess the answer is not soluble, or very sightly soluble.