tetraiodophenolphthalein
noun
tet·ra·iodo·phe·nol·phtha·lein
ˌte-trə-ī-ˌō-dō-ˌfēn-ᵊl-ˈthal-ē-ən, -ˈthal-ˌēn, -ˈthāl-
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Merriam-Webster unabridged
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