FIELD: organic chemistry.
SUBSTANCE: invention relates to an acid-base indicator disazo dye of the stilbene series for optical pH sensors operating in the range of pH = 4.0-9.0. The composition of the disazo dye is characterized by the chemical formula C30H23N5O7S2 and the following structure. The invention also relates to a process for the preparation of said indicator disazo dye.
EFFECT: improved dying efficiency.
3 cl, 2 dwg
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