who discovered chlorine and when did they discover it
The only problem was that those who did so did not recognize the element and did not know it then. Early Detection. This phenomenon of isolating this element and not recognizing it continued even when the man credited for its discovery produced it in an experiment. Carl Wilhelm Scheele was the first to study and isolate chlorine gas. He is credited for its discovery in 1774. However, he did not recognize it as an actual element.