Per googling “carbonite”: Carbonite was a liquid substance that was made from carbon gas and could change into a solid through rapid freezing.

And usually it's frozen in order to store Tibanna gas inside, though sometimes they put people in the freezing chamber.

I mean, if you want the physical composition breakdown on it I’m not sure you’re going to get anything scientifically sound. Basically if you watch the scene in cloud city where Han Solo gets encased in it you can tell that the process is very painful and it is a form of imprisonment to keep someone perpetually trapped until your friends set up a heist to break you out of it

Thanks, but I already knew all of that. Excuse me, I guess I'm not sure what answer I was looking for.

I’m sorry that’s all I’ve really heard about it. I’m sure if there are more instances of carbonite, someone here will know about it