⁹⁷In — Unstable · t½ ≈ 47 ms · Decay: β⁺ → ⁹⁷Cd · Type: synthetic · Uses: research.
⁹⁸In — Unstable · t½ ≈ 47 ms · Decay: β⁺ → ⁹⁸Cd · Type: synthetic · Uses: research.
⁹⁹In — Unstable · t½ ≈ 42 ms · Decay: β⁺ → ⁹⁹Cd · Type: synthetic · Uses: research.
¹⁰⁰In — Unstable · t½ ≈ 5.1 s · Decay: β⁺ → ¹⁰⁰Cd · Type: synthetic · Uses: research.
¹⁰¹In — Unstable · t½ ≈ 5.4 s · Decay: β⁺ → ¹⁰¹Cd · Type: synthetic · Uses: research.
¹⁰²In — Unstable · t½ ≈ 6.0 s · Decay: β⁺ → ¹⁰²Cd · Type: synthetic · Uses: research.
¹⁰³In — Unstable · t½ ≈ 60 s · Decay: β⁺ → ¹⁰³Cd · Type: synthetic · Uses: research.
¹⁰⁴In — Unstable · t½ ≈ 71.7 s · Decay: β⁺ → ¹⁰⁴Cd · Type: synthetic · Uses: research.
¹⁰⁵In — Unstable · t½ ≈ 5.1 min · Decay: β⁺ → ¹⁰⁵Cd · Type: synthetic · Uses: research.
¹⁰⁶In — Unstable · t½ ≈ 6.2 min · Decay: β⁺ → ¹⁰⁶Cd · Type: synthetic · Uses: research.
¹⁰⁷In — Unstable · t½ ≈ 32.4 min · Decay: β⁻ → ¹⁰⁷Sn · Type: activation product · Uses: tracer.
¹⁰⁸In — Unstable · t½ ≈ 39.6 min · Decay: β⁻ → ¹⁰⁸Sn · Type: activation product · Uses: tracer.
¹⁰⁹In — Unstable · t½ ≈ 4.2 h · Decay: β⁻ → ¹⁰⁹Sn · Type: activation · Uses: tracer.
¹¹⁰In — Unstable · t½ ≈ 4.9 h · Decay: β⁻ → ¹¹⁰Sn · Type: activation product · Uses: tracer.
¹¹¹In — Unstable · t½ ≈ 2.8 d · Decay: EC → ¹¹¹Cd · Type: medical isotope · Uses: scintigraphy (leukocyte & platelet imaging).
¹¹²In — Unstable · t½ ≈ 14.4 min · Decay: β⁻ → ¹¹²Sn · Type: synthetic · Uses: research.
¹¹³In — Stable · — · Type: stable (primordial) · Uses: alloys, tracers.
¹¹⁴In — Unstable · t½ ≈ 72 s · Decay: β⁻ → ¹¹⁴Sn · Type: synthetic · Uses: research.
¹¹⁵In — Unstable (primordial) · t½ ≈ 4.4×10¹⁴ y · Decay: β⁻ → ¹¹⁵Sn · Type: very long-lived · Uses: natural radioisotope, nuclear physics studies.
¹¹⁶In — Unstable · t½ ≈ 14.1 s · Decay: β⁻ → ¹¹⁶Sn · Type: synthetic · Uses: research.
¹¹⁷In — Unstable · t½ ≈ 43.2 min · Decay: β⁻ → ¹¹⁷Sn · Type: activation product · Uses: tracer.
¹¹⁸In — Unstable · t½ ≈ 39.0 min · Decay: β⁻ → ¹¹⁸Sn · Type: activation product · Uses: tracer.
¹¹⁹In — Unstable · t½ ≈ 2.1 min · Decay: β⁻ → ¹¹⁹Sn · Type: synthetic · Uses: research.
¹²⁰In — Unstable · t½ ≈ 47.0 s · Decay: β⁻ → ¹²⁰Sn · Type: synthetic · Uses: research.
¹²¹In — Unstable · t½ ≈ 23.0 s · Decay: β⁻ → ¹²¹Sn · Type: synthetic · Uses: research.
¹²²In — Unstable · t½ ≈ 7.5 s · Decay: β⁻ → ¹²²Sn · Type: synthetic · Uses: research.
¹²³In — Unstable · t½ ≈ 3.1 s · Decay: β⁻ → ¹²³Sn · Type: synthetic · Uses: research.
¹²⁴In — Unstable · t½ ≈ 3.1 s · Decay: β⁻ → ¹²⁴Sn · Type: synthetic · Uses: research.
¹²⁵In — Unstable · t½ ≈ 2.4 s · Decay: β⁻ → ¹²⁵Sn · Type: synthetic · Uses: research.
¹²⁶In — Unstable · t½ ≈ 1.2 s · Decay: β⁻ → ¹²⁶Sn · Type: synthetic · Uses: research.
¹²⁷In — Unstable · t½ ≈ 1.0 s · Decay: β⁻ → ¹²⁷Sn · Type: synthetic · Uses: research.
¹²⁸In — Unstable · t½ ≈ 0.85 s · Decay: β⁻ → ¹²⁸Sn · Type: synthetic · Uses: research.
¹²⁹In — Unstable · t½ ≈ 0.61 s · Decay: β⁻ → ¹²⁹Sn · Type: synthetic · Uses: research.
¹³⁰In — Unstable · t½ ≈ 0.29 s · Decay: β⁻ → ¹³⁰Sn · Type: synthetic · Uses: research.
¹³¹In — Unstable · t½ ≈ 0.28 s · Decay: β⁻ → ¹³¹Sn · Type: synthetic · Uses: research.
¹³²In — Unstable · t½ ≈ 0.21 s · Decay: β⁻ → ¹³²Sn · Type: synthetic · Uses: research.
¹³³In — Unstable · t½ ≈ 0.16 s · Decay: β⁻ → ¹³³Sn · Type: synthetic · Uses: research.
¹³⁴In — Unstable · t½ ≈ 0.11 s · Decay: β⁻ → ¹³⁴Sn · Type: synthetic · Uses: research.
¹³⁵In — Unstable · t½ ≈ 0.09 s · Decay: β⁻ → ¹³⁵Sn · Type: synthetic · Uses: research.

Indium — isotope count: 39 total · Stable: 1 (¹¹³In) · Primordial radioisotope: ¹¹⁵In · Unstable: 37.
(Data: IAEA LiveChart, NUBASE2020, ENSDF; applications include ¹¹¹In in medical imaging, ¹¹³In in alloys, ¹¹⁵In in fundamental nuclear physics.)