In 1999, the Japanese physician H. Takada isolated BPA from the umbilical cords of women giving birth at a clinic. In a previous incident, most primary and secondary schools in Nara, Japan stopped using melamine tableware after intense protests from parents, even though the manufacturer had established that the plates and bowls would not release BPA if the children did not scratch them with their cutlery.
一九九九年，日本醫學博士高田在醫院產婦臍帶中分離出雙酚甲烷 A，在此之前，日本奈良中小學大多使用美耐皿餐具，雖然廠商發現學童若不用刀叉刮傷碗盤，就不會釋出雙酚甲烷 A，但這些暗藏毒物的碗盤仍在家長強烈要求下被汰換。