Contains-carbon black,ceramic fibers,quartz,4-vinyl cyclohexane,acrylic fiber,alumina,antimony sulfide,aramid fiber,barytes,brass cips,calcium carbonate,cashew resin(cured),cellulose fibers,coal,coke,copper,dititanate,elastomers,glass fibers,graphite,hydrated lime,iron,iron oxide,iron pyrite,kyanite,linseed oil resin(cured),magnesium oxide,mica,mineral fibers,phenolic resin(cured),rottenstone,silica,silcates,steel fibers,talc,titanate,vermiculite,vitreous fibers,whiting,wollastonite fibers,zinc oxide,and zirconium compounds.
Does not contain asbestos. That's good,otherwise they could be dangerous.

Not like I wasn't already glad to be out of the brake factory.....
Also, think about the concentrations of these compounds around stop lights/signs after decades of braking.
I think I've wasted enough of your time.