The above case study of CORR has demonstrated Chem-I scrambling from H2, though H2 is a low molecular weight gas, and it is unclear if the Chem-I scrambling is specific to H2 or is a general phenomenon. Therefore, it was necessary to verify the universality and generality of Chem-I scrambling in the widely applied hard ionization mode (70 eV) with heavier gases than H2. As a replacement for H2, chlorine gas (Cl2) was used, but still in a CO atmosphere and with the MS operating at 70 eV.