A highly active form of oxygen produced during reactions of hydrogen peroxide with superoxide and hypochlorite ions. It is believed that this free radical is bactericidal.
Singlet oxygen, an exceptionally reactive variation of the oxygen molecule (O2), is generated during Photodynamic Therapy (PDT) to aid in the destruction of cancer cells. This potent form of oxygen exerts its therapeutic effects by targeting and attacking the cell membranes of cancerous cells, contributing to their eradication. The production of singlet oxygen within the context of PDT serves as a valuable mechanism for selectively targeting and eliminating cancer cells while minimizing damage to healthy surrounding tissues.