Methylthymol blue / methylthymol blue complexing agent / 4,7-diphenyl-1,10-phenanthroline / MTB

English name：MTB；Methylthymol blue complexone；Methyl thymol blue；Thymolsulphonphthalein-3′,3″-bis(methyleneiminodiacetic acid)；3,3′-Bis［N,N-(dicarboxymethyl)aminomethyl］thymol sulfonphthalein sodium salt

Other names:Methyl thymol blue;Methyl thymol blue complexing agent; Methyl thymol blue; 3,3 '- bis [n, n' - bis (hydroxymethyl) aminomethyl] thymol sulfonphthalein tetrasodium salt; 4,7-diphenyl-1,10-phenanthroline; N. N '- [3h-2,1-benzoxathiol-3-subunit bis [[6-hydroxy-2-methyl-5 - (1-methylethyl) - 3,1-phenylene] methylene] - bis [(N-carboxymethyl) glycine] - s, S-dioxide tetrasodium salt

CAS No.: 1945-77-3

C37H40N2Na4O13S=844.74

Grade: high pure grade

Content: ≥ 60.0%

PH color change range: 6.0 (yellow) ～ 7.6 (blue)

Physicochemical properties: dark purple to purple black powder. Soluble in water, insoluble in absolute ethanol and ether. The aqueous solution is blue, the acidic solution is yellow, the pH is light blue from 6.5 to 8.5, the pH is gray from 10.5 to 11.6, and the pH is dark blue above 12.7. The products are also made into trisodium salt and pentasodium salt

Purpose: biochemical research. Complexation indicator. Metal titration indicator. Photometric determination of color developing agents such as Al3 +, Ca2 +, Mg2 +, Hf4 +, NBO and Ti4 +, and determination of metal indicators such as Zr4 +, Bi3 +, Mg2 +, SC3 +, Cu2 + by titration.

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