Phthalates are chemicals that increase the softness and flexibility of plastic. Due to concerns about potential health problems, the US government has permanently banned three types of phthalates (DEHP, DBP, BBP)1 in any amount greater than 0.1 percent for each phthalate in children's toys and for some child care items used for toddlers ages 3 and under.
Manufacturers have been turning to alternative plasticizers, which are different phthalates, but outside the ordinary approval process little is known about the toxicity of the replacements or whether they can enter the air infants breathe for 12 to 14 hours per day at potentially harmful levels.
Since infants breathe in far more air given their low body weights than adults, Ying Xu and Yirui Liang