Assertion: henna's ppd | /r/HasProperty | hydrogen peroxide
Facets:
value: alone
type: MANNER
Source sentences:
text: During the initial method development steps, it was further determined that for the necessary oxidation of PPD, hydrogen peroxide alone was not sufficient to oxidize PPD, so to improve the kinetics of the oxidation reaction, copper(II) sulfate was added, which significantly reduced the oxidation process time.