磺酸钠盐也可以

6,6′-((ethane-1,2-diylbis(azanediyl))bis(methylene))bis(4,5-dihydroxybenzene-1,3-disulfonic acid)

CAS： 260256-39-1
Chemical Formula: C16H20N2O16S4
Exact Mass: 623.9696
Molecular Weight: 624.5740
Elemental Analysis: C, 30.77; H, 3.23; N, 4.49; O, 40.99; S, 20.53