Bromo-DragonFLY in aqueous and acidic solutions, gives characteristic thick, yellow, rectangular prisms with the platinic chloride reagent. The prisms grow individually and with straight edges but can have uneven growing ends. The size of the prisms is concentration dependent and at lower than 5 μg of the substance the prisms grow very large.

These large crystals are easily studied by IR microspectroscopy and give information-rich spectra representative of the reference Bromo-DragonFLY spectra.