Take look at that powder in steel cans before you plan on using it. I bought a box of 8 or so different powders at a yard sale a couple months ago. A steel can of IMR4895(looked like it had been unopened) passed the smell test , but when I got home and poured it out, it had a rusty dust in it. It will be used for lawn fertilizer.
All the other powders are in plastic and look and smell fine.