I'll try to transcribe it for you when I can get to my desktop with a real keyboard. There is no way I can type all that with a tablet's glass keyboard.
So this happened. Given the colour and the fact they were working with nitric acid, I'm feeling somewhat doubtful this was (relatively benign) nitrous oxide.
I assume any chemical compound that makes an orange cloud is bad news for a human being to come in contact with? Even if it isn't actually on Derek Lowe's list?
Might be making a rod for my own back here, but I think the next thing I try to build in Blender, might be a Star Wars spaceship dock - like Docking Bay 94 from ANH. Or Peli Motto's Hangar 3-5 from The Mandalorian.
I will, of course, have to design a SW ship to go in it.