Na2 S2O3\mathrm{Na}_{2} \mathrm{~S}_{2} \mathrm{O}_{3}Na2 S2O3
Na2 S4O6\mathrm{Na}_{2} \mathrm{~S}_{4} \mathrm{O}_{6}Na2 S4O6
I2I_{2}I2
NaI\mathrm{NaI}NaI