Y'all may he right that the alternatives are too long. It's one way to distinguish them anyway and those who care will know what it means.
No so sure "chemicals" is a no-no. Depends on your audience. I consider myself liberal and environmentally aware and my wife more so on both. She just asked if it was ok and I explained what was, what wasn't and why and that was that. But as I have commented on pilot boards where others keep running into folks that think an airplane plummets vertically if the engine fails, while I have NEVER met anyone who thought that, I don't seem to talk to as many dim bulbs as mist people do.