DMACA may refer to:
DMACA reagent or p-dimethylaminocinnamaldehyde, a dye used to detect proanthocyanidins polyphenolic compounds in plants DMACA crystal (or [NH2(CH3)2]3Sb2Cl9), a crystal showing ferroelectric phase transition studied in vibrational spectroscopy 7-dimethylaminocoumarin-4-acetic acid (C13H13NO4, molar mass : 247.25 g/mol, CAS number : 80883-54-1),
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