The law just changed for 2015, so although many companies were switching to less-toxic ones in the past they are now free to not use any flame retardants at all, and some are doing so. All IKEA furniture manufactured after Jan 1, 2015 should be fine. The only exception would be if you somehow bought something that was made before then, but I imagine their turnover is fast enough their 2014 stock is all sold.
The law just changed for 2015, so although many companies were switching to less-toxic ones in the past they are now free to not use any flame retardants at all, and some are doing so. All IKEA furniture manufactured after Jan 1, 2015 should be fine. The only exception would be if you somehow bought something that was made before then, but I imagine their turnover is fast enough their 2014 stock is all sold.