S P E C I F I C A T I O N S

METHYLTHYMOL BLUE SODIUM SALT ACS

Synonyms:				3,3'-Bis[N,N-di(carboxymethyl)-
					aminomethyl]thymolsulfonphthalein,
					Sodium

Chemical Formula:			C37H40N2O13Na4S

Formula Weight:			844.74

CAS No.:				1945-77-3

Appearance:				Brown to Dark-Green to black powder

Suitability as a metal indicator:	To Pass Test

Clarity of solution:			To Pass Test

Visual transition interval:		From pH 6.5 (yellow) 
To      pH 8.5 (blue)

Loss on drying @110°C		10% maximum

Effective: 01/09/09