Sacara kimiawi, indium sekadi gallium miwah thalium, taler makéhan pinaka riantara kakalih nyané ring indik cecirén ipun.[1] Indium katemuin warsa 1863 olih Ferdinand Reich miwah Hieronymous Theodor Richter nganggén metode spéktroskopi.
Chemically, indium is similar to gallium and thallium, and it is largely intermediate between the two in terms of its properties.[6] Indium was discovered in 1863 by Ferdinand Reich and Hieronymous Theodor Richter by spectroscopic methods.