Yes, it's sterile pure concentrate I believe. I went ahead and used in yesterday to make a new batch of chardonnay. I tested the juice first. It had a good smell and a good sweet taste. A bit dark for white grape juice I think, but it was concentrate and it wasn't totally dark. I'd say it was good. Only other thing I was worried about was the yeast, which was a couple months past it's exp date on the package. I was impatient so I didn't go to the store and just used the old stuff. It's bubbling really nicely this morning, so I think I'm alright.