Or it does come from Sigma and they don't want anyone to know because Sigma says it's not for human consumption.
Well, I suppose anything's possible, but wouldn't every single person at JC have to be dumb as a sack of wet mice if they don't want people to know they're secretly using Sigma nicotine, and then they keep a press release link running prominently on their home page for TWO WEEKS and counting, inviting everybody to download and read their new lab report which has a Sigma MSDS for nicotine in it? Especially after people such as yourself have been calling them up and questioning them about it?

I'm glad you emailed Alliant, though-- that's a great idea. Thank you.