142 



Biological Stains 



.7- 



I I I I I I I I J 

 460 520 580 640 700 

 WAVELENGTH m )i 



Fig. 18. Spectral curves of two phenyl methane dyes: 

 1. Brilliant green. 2. Malachite green. 



M.55 



BRILLIANT GREEN 



C. L NO. 662. 



Synonyms: Ethyl green. Malachite green G, Emerald green 

 crystals.* Solid green J JO. Diamond green G. 



This is a basic dye which is generally known in the form of the 

 acid sulfate: 



CH2CH3 



CH3CH. SO,H 



\l 



N 



_ /~\=C CH2 CH3 



CH3CH. \_/ 



C27H34N2O4S; Mol. Wt. 482.618 

 (Absorption maximum: 628-631, [^25]) 



"Malachite green, also, has been exported from Germany under this name 



