CR CAS No.573-58-0 / Cat No.EBD29968
3,3'-[(1,1'-biphenyl)-4,4'-diylbis(azo)]bis[4-amino-1-naphthalenesulfonic acid], disodium salt
CR
Congo Red
C.I. 22120
C.I. Direct Red 28
C.I. Direct Red 28, disodium salt
C.I. Direct Red 28, disodium salt (8CI)
Congo red
Direct Red 28
Congo red (0.1% in water)[for titration]
Congo red (0.1% in water)
Direct Scarlet 4B
disodium 3,3'-[biphenyl-4,4'-diyldi(E)diazene-2,1-diyl]bis(4-aminonaphthalene-1-sulfonate)
disodium 4-amino-3-[4-[4-[(1-amino-4-sulfonato-2-naphthyl)azo]phenyl]phenyl]azo-naphthalene-1-sulfonate
Direct Red 28
C.I. Direct Red 28
C.I. Direct Red 28, disodium salt
C.I. Direct Red 28, disodium salt (8CI)
Congo red
Direct Red 28
Congo red (0.1% in water)[for titration]
Congo red (0.1% in water)
Direct Scarlet 4B
disodium 3,3'-[biphenyl-4,4'-diyldi(E)diazene-2,1-diyl]bis(4-aminonaphthalene-1-sulfonate)
disodium 4-amino-3-[4-[4-[(1-amino-4-sulfonato-2-naphthyl)azo]phenyl]phenyl]azo-naphthalene-1-sulfonate
Direct Red 28
Properties
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Appearance:
brown-red powder
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Density:
0.995 g/mL at 25 °C
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Melting point:
>360 °C(lit.)
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Storage temperature:
Flammables area
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Solubility:
soluble
Safety Information
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Symbol:
-
Signal words:
Danger -
Hazard statements:
H319 Causes serious eye irritation.
H350 May cause cancer.
H361d Suspected of damaging the unborn child.
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Precautionary statements:
P201 Obtain special instructions before use.
P281 Use personal protective equipment as required.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P308+P313 IF exposed or concerned: Get medical advice/attention.
NMR Spectrum
1H NMR
13C NMR
