SPECIFICATIONS

METHYL GREEN
(C. I. 42590)

Synonyms:				Ethyl Green

CAS No:				7114-03-6

Chemical Formula:			C27H35Cl2N3 * ZnCl2

Formula Weight:			653.24

Dye Content (TiCl3 titration):	> 65%
Calculated as the ZnCl2 double salt

Description:				Dark, Brownish Red to dark green Powder

Spectroscopy:			Lambda max. 630 – 635 nm in water

Solubility:				Soluble in water and to a lesser extent in ethanol
					to give a clear deep green solution. No solid residue

Visual Transition Interval	:	pH 0.2 (yellow) to pH 1.8 (blue)

Effective: 01/09/09