| Oxidation State | Substances |
| I-I | I- (aq), HI, KI, etc., |
| I0 | I2 , I3- , I5- , etc. |
| II | In+, ICl2- etc. |
| IIII | I4O9 (= I3+(IO3-)3 ), ICl3 |
| IV | I2O5 , HIO3 , IO3- (aq), IF5 , IF6- |
| IVII | H5IO6 , H4IO6- (aq), etc., |
| HIO4 , IO4- (aq), IF7 |
Iodine: Properties
Compound Substances
| Oxidation State | Substances |
| I-I | I- (aq), HI, KI, etc., |
| I0 | I2 , I3- , I5- , etc. |
| II | In+, ICl2- etc. |
| IIII | I4O9 (= I3+(IO3-)3 ), ICl3 |
| IV | I2O5 , HIO3 , IO3- (aq), IF5 , IF6- |
| IVII | H5IO6 , H4IO6- (aq), etc., |
| HIO4 , IO4- (aq), IF7 |