Congo red indicator grade

: Disodium 3,3'-[[1,1'-biphenyl]-4,4'-diylbis(azo)]bis(4-aminonaphthalene-1-sulphonate), Sodium 3,3'-([1,1'-biphenyl]-4,4'-diylbis(diazene-2,1-diyl))bis(4-aminonaphthalene-1-sulphonate), CI 22120, Direct Red 28

:573-58-0

:C₃₂H₂₂N₆Na₂O₆S₂

:MFCD00004028

:696.67 g/mol

:12,02562

:>360 °C

:209-358-4

:GHS08

:Ambient

Environmentally Preferable:

Appearance:
Dark red to red-brown Powder
Infrared spectrum:
Conforms
UV spectrum:
Complies
Solubility:
(0.1 % in water) Clear
Visual transition interval:
from pH 3.0 (violet) to pH 5.2 (red-orange)

ACRO11050