I did a quick Google search on DOT - Class 6.1 Toxic - Packing Group lll. Got a lot of results, and clicked on 1 of them that went here:
http://environmentalchemistry.com/yogi/hazmat/placards/class6.html
On that page you can find some info on it. Then, you can find more info. on what Class 6 Chemicals are (including Nicotine), and what Packing Group III is, and their shipping limits, on this page:
http://environmentalchemistry.com/yogi/hazmat/placards/class6-chemicals.html
In the chart, various forms of Nicotine are about 1/2 way down the page. In 2 of the columns, it tells how much can be carried on passenger aircraft/rail, and then how much on cargo aircraft only. The limit on passenger aircraft/rail is definitely much much smaller.
I'm sure there's much more info. on many other websites. That was just found looking quickly at only 1 of them.
http://environmentalchemistry.com/yogi/hazmat/placards/class6.html
On that page you can find some info on it. Then, you can find more info. on what Class 6 Chemicals are (including Nicotine), and what Packing Group III is, and their shipping limits, on this page:
http://environmentalchemistry.com/yogi/hazmat/placards/class6-chemicals.html
In the chart, various forms of Nicotine are about 1/2 way down the page. In 2 of the columns, it tells how much can be carried on passenger aircraft/rail, and then how much on cargo aircraft only. The limit on passenger aircraft/rail is definitely much much smaller.
I'm sure there's much more info. on many other websites. That was just found looking quickly at only 1 of them.