Can of fruit has a black ring around it on the inside near the top. Is it safe?!
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I used a can of Dole pineappe chunks in a recipe the other day, and forgot the can sitting on the counter overnight with the juice in it. The next morning, there was a black ring at the top level of the liquid in the can. It wasn't there when I used the fruit. I believe the exposure to the air and the acidity of the pineapple juice reacted with the metal of the can in a chemical reaction. If yours was there when you opened it, it might have already been unsealed although it wasn't apparent. That's how botulism can form, so it's a good thing you discarded it.
that doesn't sound all that great. what i do is look at the expiration date on it just to check and make sure. i don't know of any canned fruit that had any black rings around it so that must've expired or had bacteria in it so i would've thrown it away. :)
