In 2012, we analyzed urine specimens for free and total (conjugated plus free) concentrations of nine compounds: BPA, butyl paraben, ethyl paraben, methyl paraben, propyl paraben, benzophenone-3, triclosan, 2,4-dichlorophenol, and 2,5-dichlorophenol.
Ethyl paraben could not be reliably quantitated because it was a component of the urine preservative added to prevent bacterial growth.
In the case of MoBa, the likely sources of BPA contamination were the urinary preservative (sodium propionate 94%, ethyl paraben 5.
6% ethyl paraben was the source of the detected ethyl paraben.
These compounds were bisphenol A -- found in plastics -- and triclosan, benzophenone-3 and propyl, methyl, butyl and ethyl parabens
, found in personal-hygiene products and some foods and medications.