Widespread Occurrence of Bisphenol A in Paper and Paper Products: Implications for Human Exposure
Level 5 - mechanism / opinion, no new human data
Level 5 by design analogy; analytical bench chemistry survey of consumer products paired with exposure intake modeling, without human clinical or biomonitoring data.
OpenAlex W2088289999 · doi:10.1021/es202507f
What was done
Concentrations of bisphenol A (BPA) were measured across 202 paper products spanning 15 categories (including thermal receipts, food contact papers, napkins, newspapers, and printing papers) collected across several US cities, with additional thermal receipts collected from Japan, Korea, and Vietnam. Daily intake via dermal absorption was mathematically modeled for both the general population and occupationally exposed individuals based on handling frequency and measured concentrations.
What was found
BPA was detected in 94% of thermal receipt papers (n = 103), ranging from <1 ng/g to 13.9 mg/g (geometric mean: 0.211 mg/g). In other paper products (n = 99), 81% contained BPA ranging from <1 ng/g to 14.4 μg/g (geometric mean: 0.016 μg/g), with recycled paper products like napkins and toilet paper containing microgram-per-gram levels. Modeled daily dermal intake was 17.5 ng/day for the general population and 1300 ng/day for occupationally exposed individuals, with thermal receipts accounting for >98% of the exposure from paper products.
Why it matters
This study identifies thermal receipt papers as the primary contributor to paper-related dermal BPA exposure and highlights recycled paper as a secondary cross-contamination pathway, while contextualizing these exposures as minor relative to diet.
Limits
Human exposure was calculated entirely through mathematical assumptions of handling and dermal absorption rather than measured using in vivo biomonitoring (such as urinary or serum BPA levels). The sample collection relied on convenience sampling across selected locations, and transdermal penetration rates were not experimentally validated under varying real-world conditions.
Cited by
- supports Thermal paper receipts are coated with bisphenol A (BPA) to facilitate printing.