An isotope of iodine is used for making tincture iodine , which is used as a medicine , is it true or false? Please give reason for this. Share with your friends Share 4 Avni answered this It is true. The isotope used is Iodine-127 since it isthe only stable isotope of Iodine. -2 View Full Answer Siddhi Pawar answered this It is true. Chemical properties of the isotope of this type of iodine is different. 3