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

5,5'-DITHIOBIS(2-NITROBENZOIC ACID), 99%

Synonyms:			3-Carboxy-4-nitrophenyl disulfide;
DTNB; Ellmann’s Reagent

CAS No:				69-78-3

Chemical Formula:			C14H8N2O8S2

Formula Weight:			396.34

Description:				Off-White to yellow powder 

Assay (Titration):			99.0% minimum

Identification:			To Pass Test

Melting Point:			230-245 Deg. C

Loss on drying:			0.5% maximum

Solubility:				Clear, light yellow solution
 (1%,  Ethanol)

Effective: 01/26/09