Especially when kept in a fridge, since ketchup is shelf stable. In the fridge it should go well past the pull date.

Ketchup is vinegar-based. I don't think it makes much of a difference.

The ketchup doesn't go bad, but the plastic container offgasses directly into the ketchup and also into the air void above the ketchup.

> into the air void above the ketchup.

Somebody at Heinz packaging department should be working on a ketchup syringe.

That sounds like an area where someone can sell a device that scans for toxins/mold/etc. Put a sample, if the machine says "Bad" then throw away, if it says "OK", then hope it's not an Elizabeth Holmes-esque shithousery...

No AI needed though, so, not sexy...