That MSDS refers to the pure stuff.
Here's an European MSDS to 18 mg /ml liquids ;
http://www.avoria-liquids.de/kch_liquid_18_EN_MSDS.pdf
That's why you have these uneven numbers on the nic base sometimes. Like 72 mg/ml in the EU. Anything above that is classed as poisonous and you'd need a permit to sell,buy,store or handle it. And the permit you'd get only after taking a rather expensive training course. Unless you're a certified pharmacist or chemists. Is part of their certification for their job.
Nowadays, is 48 mg/ml max, due to some finetuning of the chem regs.
There's stickies in the DIY section about safe handling/precautions. No need to gear up like Dustin Hoffmann in 'Outbreak', but even diluted, we're dealing with a harmful substance nevertheless. No point in feeding the ANTZ propaganda machine with bad news. Common sense, common caution, Just as we're admonishing mech modders to play it safe with their batteries, we oughta play it safe with DIY-liquids as well.
Plenty got hurt by using BT's products. No need to carry that over to vaping
Vape safe, mix safe