Sorbitan Monostearate in Baking Yeast

Recently I discovered that the baking yeast I purchase (and most of them that I looked at) have Sorbitan Monostearate added. I am a very frequent baker/breadmaker (almost every day) and wonder if I need to be concerned about this ingredient. I did a bit of online research and saw the MSDS but wasn't sure what to take from it. Some sites say it's safe, others say it's toxic (in large quantities, I assume).