Here (and here, for when the front page advances). Chlorine trifluoride has always had a horrified fascination for me, as my readers might remember: there’s just something about a substance so outrageously deadly that it ignites sand. Then again, Freefall is one of those deceptively brilliant webcomics that would have a syndication deal in an even marginally fairer world, so I shouldn’t be surprised that it name-drops the stuff.