Assertion: dye | /r/HasProperty | bisphenol a
Facets:
Source sentences:
text: The acids include bisphenol A, parabens, 1,2,3-triazole derivates, and 4-hydroxycoumarin and act as proton donors, changing the dye molecule between its leuco form and its protonated colored form; stronger acids would make the change irreversible.