Ether is the solvent used to combine the components of many powders. And then the nitros or nitrides in the powder. Either can be not compatible with certain Plastics. My old Lyman 55 powder measure has a part cloudy powder resoviour , Many years ago I left some Bullseye or Herco in it for 24 hours to finish a run of 38 Sp. or 357 Mag. pistol loads.
If powder is removed from its original container make sure it is properly identified on outside of container, On the lid, And place a piece of paper inside with what powder is in the container. As a wildlife officer and Hunter Safety instructor I have heard many horror stories and seen the results of the wrong powder being loaded. I once had a muzzle loader I took to H.E. classes in pieces. Miracle Whip jars of Black Powder and Hercules Herco got mixed up and blew the rifle to splinters of steel and wood. Shooter got a piece of steel through his upper arm and hair scorched.
I have IMR 4350 from about 3 or 4 different lots. I have considered mixing them together and making one big uniform lot. Then replace in original cans and mark as such. I use IMR 4350 in 243 Win. 300 WSM and 338 WM. Would save checking loads in all 3 rifles every time I change lots of powder.