All I can say about water is that if short esters bother you, DO NOT shoot it sub Q in the belly fat.
I had to drain an abcess and it burned like hell upon impact. I would shoot it there when my pecks got too sore and carry a lump in the fat for weeks. I did it because I could not get the darn stuff in me unless I had it in front keeping it shook. I would shoot it and wait for the fire. It was like acid. Shoot, yell, and repeat
Finally the abcess was the last straw.
That stuff was a pain in the ass but it was instantaneous results.