What's the Deal With Arsinol?

If you've been digging through old medical journals or niche chemical databases, you've likely bumped into the term arsinol and wondered what it actually is. It sounds like something you'd find in a dusty 1920s pharmacy cabinet, sitting right next to the tinctures of opium and mercury—and honestly, that's not too far from the truth. It belongs to a category of substances that have mostly faded into the background of history, yet they offer a pretty fascinating look at how we used to think about medicine and chemistry. ...

April 30, 2026 · 7 min · Mcgrady Loop