Astronomers have detected traces of methyl chloride, or Freon-40, surrounding infant stars and the comet 67P/Churyumov-Gerasimenko, suggesting it forms naturally in interstellar clouds. The findings quash the hope that some researchers had that the compound might signal the presence of life.

See the source article by following the link below:
Astronomers have detected traces of methyl chloride, or Freon-40, surrounding infant stars and the comet 67P/Churyumov-Gerasimenko, suggesting it forms naturally in interstellar clouds. The findings quash the hope that some researchers had that the compound might signal the presence of life.