4,4′,4”-Triaminotriphenylamine (TATA), a symmetric triphenylamine derivative with amino groups at the 4-position of each phenyl ring, has a molecular formula of C??H??N? and molecular weight of 290.36 g/mol. As a key organic semiconductor, it is widely used in optoelectronic devices (e.g., OLEDs, solar cells) for its excellent hole-transporting properties. It should be stored sealed under inert gas to avoid oxidation of amino groups, ensuring performance stability.