As a primary amine, the dye can be diazotized in the laboratory, and the resulting diazonium salt used as a trapping agent in enzyme histochemistry.
2.
Benzinduline ( aposafranine ), C 16 H 13 N 3, is a strong base, but cannot be diazotized, unless it be dissolved in concentrated mineral acids.
3.
It is a substantive cotton dye of rather fugitive shade, but can be diazotized on the fibre and then developed with other components, yielding a series of ingrain colors.
4.
In the development of thin layer chromatography plates with diazotized p-nitroaniline spray, cryogenine produces a purple spot ( as does sinicuichine, another biphenylquinolizidine lactone alkaloid found in " Heimia " species ).
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