paraphenylenediamine
noun
para·phen·yl·ene·di·amine
-ˌfen-ᵊl-ˌēn-ˈdī-ə-ˌmēn 
: the para isomer of phenylenediamine that is used especially in dyeing hair and sometimes causes an allergic reaction
Cite this Entry
“Paraphenylenediamine.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/paraphenylenediamine. Accessed 6 Jul. 2025.
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