The best replacement for iodate is iodide.

The best alternatives to iodate are rated as following:
★★★★★  iodide
★★★  potassium iodide

Your alternative for iodate is not listed? Suggest!
Speaking about iodate, one probably shouldn't forget about iodide.

Other search terms related to iodate and their ratings are:

★★★★★ iodide
★★★★★ potassium iodide
★★★ thiosulfate
sodium thiosulfate
sodium thiosulphate
saturated cupric iodate
You have in mind a companion for iodate and it is not yet here? Propose!

Google Trends

Scale is based on the average worldwide traffic of iodate in all years. Click on graph for more.
potassium iodide