I send chemicals overseas for work all the time. It is a pia, but it can be done. We send our chemicals to an authorized place to pack them and then they send it to a forwarder for air transport. It costs us a few hundred dollars to get out stuff packed into special boxes, but we're shipping about 100 pounds of stuff at a time. One time, for an epoxy, they wouldn't let it on a plane and we had to still have it specially packed and then arrange ocean transport.
The company I use to pack is Airpack, in Baltimore, MD. They then send it to BAX Global for shipping. It's probably more trouble than it's worth, but anything can be done with the right amount of $$$. If you can get an MSDS sheet, most places should be able to tell you whether or not they can do it.
Good luck.
Walt