Hi jlucas,
The specific chemicals that are used in each manufacturers foam formulations are proprietary information and aren’t available to the public but you can see a list of the harmful substances and the limit values of what CertiPUR tests for here*.
ADMIN NOTE:*Always check CertiPur site for the latest guidelines available
Unfortunately there are still some people that are unusually sensitive to certain smells (the odor isn’t an indication of toxicity because safe substances can have a smell and unsafe substances can be odor free) or to some versions of materials that are made by a particular manufacturer or in some cases even to specific batches of a material that are made by the same manufacturer (see post #2 here which also includes my own similar experience).
The smell will normally be reduced to levels that most people don’t notice within a few days to a few weeks but there are some suggestions in post #3 here that may help speed up the process. If you are one of the small minority that is still sensitive to the materials in a mattress after a few weeks then the only remaining options would be to either enclose it with a material that will block any VOC’s or replace it.
Phoenix