¹⁰⁸I — Unstable · t½ ≈ 36 ms · Decay: β⁺ → ¹⁰⁸Te · Type: synthetic · Uses: research.
¹⁰⁹I — Unstable · t½ ≈ 130 ms · Decay: β⁺ → ¹⁰⁹Te · Type: synthetic · Uses: research.
¹¹⁰I — Unstable · t½ ≈ 650 ms · Decay: β⁺ → ¹¹⁰Te · Type: synthetic · Uses: research.
¹¹¹I — Unstable · t½ ≈ 2.5 s · Decay: β⁺ → ¹¹¹Te · Type: synthetic · Uses: research.
¹¹²I — Unstable · t½ ≈ 3.4 s · Decay: β⁺ → ¹¹²Te · Type: synthetic · Uses: research.
¹¹³I — Unstable · t½ ≈ 2.4 s · Decay: β⁺ → ¹¹³Te · Type: synthetic · Uses: research.
¹¹⁴I — Unstable · t½ ≈ 2.0 s · Decay: β⁺ → ¹¹⁴Te · Type: synthetic · Uses: research.
¹¹⁵I — Unstable · t½ ≈ 1.3 s · Decay: β⁺ → ¹¹⁵Te · Type: synthetic · Uses: research.
¹¹⁶I — Unstable · t½ ≈ 2.9 s · Decay: β⁺ → ¹¹⁶Te · Type: synthetic · Uses: research.
¹¹⁷I — Unstable · t½ ≈ 2.0 s · Decay: β⁺ → ¹¹⁷Te · Type: synthetic · Uses: research.
¹¹⁸I — Unstable · t½ ≈ 13.7 s · Decay: β⁺ → ¹¹⁸Te · Type: synthetic · Uses: research.
¹¹⁹I — Unstable · t½ ≈ 19.1 s · Decay: β⁺ → ¹¹⁹Te · Type: synthetic · Uses: research.
¹²⁰I — Unstable · t½ ≈ 81 s · Decay: β⁺ → ¹²⁰Te · Type: synthetic · Uses: research.
¹²¹I — Unstable · t½ ≈ 2.1 min · Decay: β⁺ → ¹²¹Te · Type: synthetic · Uses: research.
¹²²I — Unstable · t½ ≈ 3.6 min · Decay: β⁺ → ¹²²Te · Type: synthetic · Uses: research.
¹²³I — Unstable · t½ ≈ 13.2 h · Decay: EC → ¹²³Te · Type: medical isotope · Uses: SPECT imaging (thyroid, brain blood flow).
¹²⁴I — Unstable · t½ ≈ 4.2 d · Decay: β⁺ → ¹²⁴Te · Type: medical PET isotope · Uses: PET imaging of tumors & thyroid.
¹²⁵I — Unstable · t½ ≈ 59.4 d · Decay: EC → ¹²⁵Te · Type: medical/tracer isotope · Uses: oncology, radiotherapy seed implants, research.
¹²⁶I — Unstable · t½ ≈ 13.0 d · Decay: β⁻ → ¹²⁶Xe · Type: fission product · Uses: reactor tracer.
¹²⁷I — Stable · — · Type: stable (primordial, only stable isotope) · Uses: essential nutrient in thyroid hormones.
¹²⁸I — Unstable · t½ ≈ 25.0 min · Decay: β⁻ → ¹²⁸Xe · Type: activation product · Uses: tracer.
¹²⁹I — Unstable · t½ ≈ 1.57×10⁷ y · Decay: β⁻ → ¹²⁹Xe · Type: long-lived fission product · Uses: geochronology, nuclear waste monitoring.
¹³⁰I — Unstable · t½ ≈ 12.3 h · Decay: β⁻ → ¹³⁰Xe · Type: fission product · Uses: tracer.
¹³¹I — Unstable · t½ ≈ 8.0 d · Decay: β⁻ → ¹³¹Xe · Type: medical/fission product · Uses: thyroid cancer therapy, diagnostic tracer.
¹³²I — Unstable · t½ ≈ 2.3 h · Decay: β⁻ → ¹³²Xe · Type: fission product · Uses: tracer.
¹³³I — Unstable · t½ ≈ 20.8 h · Decay: β⁻ → ¹³³Xe · Type: fission product · Uses: reactor monitoring.
¹³⁴I — Unstable · t½ ≈ 52.5 min · Decay: β⁻ → ¹³⁴Xe · Type: fission product · Uses: reactor monitoring.
¹³⁵I — Unstable · t½ ≈ 6.6 h · Decay: β⁻ → ¹³⁵Xe · Type: fission product · Uses: reactor control (xenon poisoning studies).
¹³⁶I — Unstable · t½ ≈ 83.0 s · Decay: β⁻ → ¹³⁶Xe · Type: synthetic · Uses: research.
¹³⁷I — Unstable · t½ ≈ 24.5 s · Decay: β⁻ → ¹³⁷Xe · Type: synthetic · Uses: research.
¹³⁸I — Unstable · t½ ≈ 6.5 s · Decay: β⁻ → ¹³⁸Xe · Type: synthetic · Uses: research.
¹³⁹I — Unstable · t½ ≈ 2.0 s · Decay: β⁻ → ¹³⁹Xe · Type: synthetic · Uses: research.
¹⁴⁰I — Unstable · t½ ≈ 0.9 s · Decay: β⁻ → ¹⁴⁰Xe · Type: synthetic · Uses: research.
¹⁴¹I — Unstable · t½ ≈ 0.5 s · Decay: β⁻ → ¹⁴¹Xe · Type: synthetic · Uses: research.
¹⁴²I — Unstable · t½ ≈ 0.4 s · Decay: β⁻ → ¹⁴²Xe · Type: synthetic · Uses: research.
¹⁴³I — Unstable · t½ ≈ 0.2 s · Decay: β⁻ → ¹⁴³Xe · Type: synthetic · Uses: research.
¹⁴⁴I — Unstable · t½ ≈ 0.16 s · Decay: β⁻ → ¹⁴⁴Xe · Type: synthetic · Uses: research.
¹⁴⁵I — Unstable · t½ ≈ 0.1 s · Decay: β⁻ → ¹⁴⁵Xe · Type: synthetic · Uses: research.
Iodine — isotope count: 38 total · Stable: 1 (¹²⁷I) · Unstable: 37.
(Data: IAEA LiveChart, NUBASE2020, ENSDF; notable applications: ¹²³I and ¹²⁴I in imaging, ¹²⁵I in brachytherapy & research, ¹³¹I in thyroid therapy, ¹²⁹I in dating and waste monitoring, ¹³⁵I in reactor physics.)