Halogen free boards


I checked the datasheet for the FR4 used by aisler (UV-Block_FR-4-86-2.pdf).
For a project I do need halogen free PCBs. Is there an alternate base material available?

Our Multilayer Boards use Halogen Free FR4 material.

For those that are wondering, here is the link to the datasheet:

Those values <900ppm each and <1500ppm sum of Cl+Br are the definition of halogen free.