[OutOfHere]

Even if that were true, if you carry bulk powders in your carry-on, at minimum it is their assumed responsibility to visually examine it for not being an explosive powder. I have had to remove these powders from the carry-on bag for them to see. After seeing the labels, they consulted a senior officer, and only then let me through. For this reason, if I have a check-in bag, I keep it there.

[spidercat]

Oh, I probably should have mentioned that I almost always keep my powders capped - I just cap them myself at the doses I need. Keeping the powder loose probably does raise more flags. I'm just so used to capping them, I didn't even think about how sketchy loose powder in ziploc baggies could look.