I had a pound bottle of powder go bad once before, but nothing this dramatic. What looks to be the lid is only the paper liner under the metal lid. When I peeled the paper back there were evil looking and smelling brown fumes curling up from the powder. It was badly clumped and much of it was a dirty brown color. The fumes had a very strong acid smell which would burn the nose. All that was left of the metal from the lid was an oily feeling residue and a ring of crud on the bottle. It appears that the acid fumes are attacking other metallic objects around the powder containers. What a mess !!
When inspecting the pictures I noticed the second bottle, both of which were surplus 4895 had also gone bad, I went and removed it and cleaned off the shelf --- And I just now noticed the red looking liquid under the 7383 bottle. Dang, I have to get some better lights in there.
Milkman