6082. Methyl Green

Nomenclature

CAS number: 14855-76-6
4-[[4-(Dimethylamino)phenyl][4-(dimethylimino)-2,5-cyclohexadien-1-ylidene]methyl]-N-ethyl-N,N-dimethylbenzenaminium bromide chloride; C.I. 42590; ethyl green.
C27H35BrClN3; mol wt 516.94.
C 62.73%, H 6.82%, Br 15.46%, Cl 6.86%, N 8.13%.

Description and references

Usually sold as the double salt with ZnCl2. Prepn: Colour Index vol. 4 (3rd ed., 1971) p 4394.

Chemical structure

Properties

Green powder. Sol in water. Yellow soln in conc H2SO4, turning green on dilution.

Note

The term methyl green also applies to the trimethyl analog.

Use

Dyeing and printing textiles; as biological stain.