​Add capsaicin to chemicals that are toxic but not poisonous, so if you get any on yourself, you know and can wash it off.

There is a fair body of chemicals which are toxic but not poisonous, and you can get cancer or something without ever realizing it. Long ago, natural gas was unscented, until a bunch of houses blew up, and we added the bad smell.

Chemicals are a little bit different, and we couldn’t do the same exact thing with the smell, but what do you think about the possibility of adding small amounts of capsaicin to toxic chemicals so if you get any on yourself you will instantly feel the burning and know you need to wash it off?