Í2Î2–1 îáëàäàåò îêèñëèòåëüíî-âîññòàíîâèòåëüíîé äâîéñòâåííîñòüþ, Î20 ←—Í2Î2–1 —→Í2Ζ2 èëè (Ζ2Í)–
| ÑÐÅÄÀ | Í2Î2 | |
| Âîññòàíîâèòåëü | Îêèñëèòåëü | |
| Êèñëàÿ | Í2Î2−2ē = Î2+2Í+ | Í2Î2+2Í++2ē =2Í2Î |
| Ùåëî÷íàÿ | Í2Î2+2ÎÍ−−2ē = Î2+2Í2Î | Í2Î2+2ē = 2ÎÍ− |
| Íåéòðàëüíàÿ | Í2Î2−2ē = Î2+2Í+ | Í2Î2+2ē = 2ÎÍ− |