I'm surprised sometimes when people say, wow I wish I had SN, cos I was shocked at how easy it is to get. I have a kg of SN, not because that's what I really wanted to use to CTB but because so many people were talking about & choosing it as their preferred method of CTB. I guess I wanted to get some cos everyone was. I read online about what it was used for and one of the sites u went to said some people use it as a preservative when they are curing meat, so I rang a chemical company that was selling it and told them I was wanting to cure some meats etc etc. I made myself as believable as poss engaging in talk about the various recipes and meats I was wanting to cure, even said I was using a family recipe. They took it, hook, line & sinker and within a week I had 1kg with offers to make a standing order. Too easy.