👉 The word you're referring to is '4997.2 Fluoro 4 (triethylstannyl)pyridine'. It's a compound that looks and feels like a bunch of really cool bits of stuff, but when you mix them together, they make a very scary-looking substance that can cause lots of trouble if you don't know what you're doing.
Here's an example sentence from the compound: "Hey there, kids! Are you guys in a spooky mood? Well, guess what? Our '4997.2 Fluoro 4 (triethylstannyl)pyridine' is in the mix and it might be causing some trouble for some of us. Just know that if you accidentally inhale too many parts of this stuff, you're in for a real scare." This sentence uses the word 'scare' to describe how the compound can cause problems, which makes the statement come across as very unsettling.