Zeolite
Formula: Al2O5Si
Molecular Weight: 162.05
Cas No：1318-02-1
[1] Wikipedia, the free encyclopedia, http://en.wikipedia.org.
It's a mineral that absorbs moisture, sebum, and other toxins, supposedly. It'll be good for sebum/oil reduction, at the very least, as this is a common ingredient in many absorbing products, such as cat litter.