Here is an interesting video by Arlene Blum and the Green Science Policy Institute with a good introduction into the world of Fire Retardants.
It is also worth mentioning that in the USA flame retardants are used in the fillings, but not the outer cover material. Here in the UK we use far greater amounts in our furniture.
“Flame retardants are added to products to meet flammability standards. However, they often don’t improve fire safety and can harm our health. Learn why they should be avoided and what you can do. www.sixclasses.org “