Chemical synonyms: 3,3'-Bis[N,N-di(carboxymethyl)aminomethyl]thymolsulfonephthalein sodium salt; MTB; Thymolsulfonphthalein-3',3?-bis(methyliminodiacetic acid sodium salt) Product Brand: Analytical Density (g/cm3): 1.14 Molecular weight: 844.74 Molecular formula: C37H40N2O13SNa4