I decided to pitch the powder after reading the posts here. I took the tupperware lid off and the smell was real strong. That decided it for sure, it was scattered to the wind out in the snowy back yard.
You know, I catch a lot of crap from people who have hoards of old ammunition, hate me for suggesting that the stuff will not last forever, can blow up their firearms, and does not get better with age.
I am glad to know the truth helped someone avoid an unpleasant experience.