The best replacement for talc is cornstarch.

The best alternatives to talc are rated as following:
★★★★★  cornstarch
★★★★  mica
★★  baby powder
★★  cornstarch baby powder
★★  cornstarch powder
★  calcium carbonate
★  corn starch
★  french chalk
  silica
  gypsum
  parabens
  diatomaceous earth
  kaolinite

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

Other search terms related to talc and their ratings are:
★★★★★ foundation
You have in mind a companion for talc and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of talc in all years. Click on graph for more.
talc
cornstarch
mica