A report by the US non-profit organisation Ecology Center has discovered that receipts from main chain shops in 22 US states and the District of Columbia include excessive concentrations of bisphenols , significantly bisphenol A ( BPA ) and bisphenol S ( BPS ), that are linked to reproductive hurt. Researchers examined 374 receipts from 144 shops and located 80% contained the chemical compounds. The research highlighted that the chemical compounds might be readily absorbed by way of the pores and skin and are a “common exposure route”. The report referred to as on retailers to make use of non-toxic paper and to take away bisphenols from receipts altogether, providing digital receipts instead.