Not that I'm very knowledgeable about it but SN works via changing our red bloodcells so that they can't carry/transmit oxygen as effectively. As I understand it, a kind of chemical asphyxiation. So- it needs to come into contact with the blood. It's absorbed via the intestines when we drink it. I'm not sure how that would work in the lungs. Plus, I'm not sure what happens when you set fire to SN! Sounds very risky.