I opened up my reloading cabinet yesterday and saw that something happened to my bottle of 4064. The cabinet is in a temperature controlled space and I hadn't noticed any issues earlier with the bottle of powder. When I opened the drawer yesterday it appeared as if the lid had disintegrated and popped off. I did not remove the lid in the photo. The photos show the 4064 and the adjacent powder. The other shows the bottom of the drawer. It either fell down into the bottle or into the bottom of the drawer. There was a strong chlorine smell also. The other cans and bottles had their external steel rusted. The closer to the 4064 the worse the rust.

The powder is at least 10 years old.

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