I remember my chemistry teacher in high school telling how they used to use 'tri' (that's how they called it) a lot to wash their hands in. Until they discovere

I remember my chemistry teacher in high school telling how they used to use 'tri' (that's how they called it) a lot to wash their hands in. Until they discovered that it was highly carcinogenic. But yeah, that chemistry class was in the early 80's, so it is now ages ago that tri was still widely used.