Original Commentary
Yes, aroma chemicals. I did some research and that's the technical term. There are, it turns out, real companies that do what Lemon Technology does. I picked aroma chemicals because I had just read a half-dozen comics where the lead character worked in some kind of glamorous high-profile job. The kind where they or their creations were known nationwide. I wanted something that was so low-profile that most people didn't think about it, something that people didn't already have an opinion about - Terrence

Modern Commentary
"Poisonous" is a strong word for it. I'm sure the concentrated chemicals aren't good for you, but if you added a few drops of Mint Aroma to a drink you'd be fine. Eventually. - Terrence