- any of a series of basic organic compounds, the simplest having the formula C12H11N3, which form bluish and greenish salts, used in the manufacture of dyes.
- an organic base used in the production of the dye safranine. Formula: NH 2 C 6 H 4 N:C 6 H 4 :NH
- any of a class of organic bases with a similar structure to this compound. Their salts are unstable blue and green dyes
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