C.I. Direct Red 28

C.I. Direct Red 28 structural formula

CAS Number573-58-0
Molecular FormulaC32H22N6Na2O6S2
Molecular Weight696.660
InChI KeyIQFVPQOLBLOTPF-HKXUKFGYSA-L
LogP2.77
Synonyms
  • C.I. Direct Red 28
  • Disodium 3,3'-{[1,1'-biphenyl]-4,4'-diylbis[(E)diazene-2,1-diyl]}bis(4-aminonaphthalene-1-sulfonate)
  • 1-Naphthalenesulfonic acid, 3,3'-[[1,1'-biphenyl]-4,4'-diyldi(E)-2,1-diazenediyl]bis[4-amino-, sodium salt (1:2)
  • 573-58-0
  • Congo red
  • 1-Naphthalenesulfonic acid, 3,3'-[[1,1'-biphenyl]-4,4'-diylbis(azo)]bis[4-amino-, disodium salt
  • 1-Naphthalenesulfonic acid, 3,3'-[[1,1'-biphenyl]-4,4'-diylbis(2,1-diazenediyl)]bis[4-amino-, sodium salt (1:2)
  • 3,3'-[(1,1'-Biphenyl)-4',4'-diyl)bis(azo)]bis[4-amino-1-naphthalenesulfonic acid, disodium salt
  • 3,3'-[[1,1'-bifenil]-4,4'-diilbis(azo)]bis(4-aminonaftaleno-1-sulfonato) de disodio
  • 3,3'-[[1,1'-Biphenyl]-4,4'-diylbis(azo)]bis(4-aminonaphtalene-1-sulfonate) de disodium
  • Atlantic Congo Red
  • Atul Congo Red
  • Azocard Red Congo
  • Benzo Congo Red
  • Brasilamina Congo 4B
  • C.I. direct red 028
  • C.I. Direct Red 28, disodium salt
  • Congo Red 4B
  • Congo Red 4BX
  • Congo Red CR
  • Congo Red H
  • Congo Red K
  • Congo Red L
  • Congo Red M
  • Congo Red N
  • Congo Red R
  • Congo Red RS
  • Congo Red sodium salt
  • CONGO RED STAIN
  • Congo Red TS
  • Congo Red W
  • Congo Red WS
  • Cotton Red 4BC
  • Cotton Red 5B
  • Cotton Red L
  • Diacotton Congo Red
  • Dinatrium-3,3'-[[1,1'-biphenyl]-4,4'-diylbis(azo)]bis(4-aminonaphthalin-1-sulfonat)
  • Direct Congo Red
  • Direct Red 28
  • Direct Red C
  • Direct Red DC-CF
  • Direct Red K
  • disodium 3,3'-[[1,1'-biphenyl]-4,4'-diylbis(azo)]bis(4-aminonaphthalene-1-sulphonate)
  • Erie Congo 4B
  • Haemomedical
  • Haemonorm
  • Hemorrhagyl
  • Hispamin Congo 4B
  • Kayaku Congo Red
  • KONGOROT
  • Mitsui Congo Red
  • Peeramine Congo Red
  • SODIUM DIPHENYL-BIS-{NAPHTHYLAMINE) SULFONATE}
  • Solucongo
  • Sugai Congo Red
  • Tertrodirect Red C
  • Trisulfon Congo Red
  • Vondacel Red CL
  • Congazone sodium
  • Congo Red ICI
  • EINECS 209-358-4
  • NSC 56651
  • Sodium diphenyldiazo-bis(alpha-naphthylaminesulfonate)
  • NSC 7232
  • Cerven kongo
  • Cerven prima 28
  • Natrium-salz der diphenyl-bis-azo-bis-naphthylamin-4-sulfonsaeure
  • UNII-3U05FHG59S
  • 1000818-40-5
  • 550-08-3
  • 70248-72-5
  • 87440-95-7

Applications:

Separation of C.I. Direct Red 28 on Newcrom R1 HPLC column

February 16, 2018
Separation of C.I. Direct Red 28 on Newcrom C18 HPLC column

C.I. Direct Red 28 can be analyzed by this reverse phase (RP) HPLC method with simple conditions. The mobile phase contains an acetonitrile (MeCN), water, and phosphoric acid. For Mass-Spec (MS) compatible applications the phosphoric acid needs to be replaced with formic acid. Smaller 3 µm particles columns available for fast UPLC applications. This liquid chromatography method is scalable and can be used for isolation impurities in preparative separation. It also suitable for pharmacokinetics.

Application Column

Newcrom R1

The Newcrom columns are a family of reverse-phase-based columns. Newcrom A, AH, B, and BH are all mixed-mode columns with either positive or negative ion-pairing groups attached to either short (25 Å) or long (100 Å) ligand chains. Newcrom R1 is a special reverse-phase column with low silanol activity.

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Application Analytes:
C.I. Direct Red 28
The result was obtained by a proprietary SIELC algorithm. It may deviate from the actual experimental data. The experimental data are available upon request. Contact us before ordering the column as there may be a more suitable column alternative by either e-mail: support@sielc.com or by phone: 847-229-2629.