C.I. Direct Blue 1

C.I. Direct Blue 1 structural formula

CAS Number2610-05-1
Molecular FormulaC34H24N6Na4O16S4
Molecular Weight992.790
  • C.I. Direct Blue 1
  • Tetrasodium 6,6'-{(3,3'-dimethoxy[1,1'-biphenyl]-4,4'-diyl)bis[(E)diazene-2,1-diyl]}bis(4-amino-5-hydroxynaphthalene-1,3-disulfonate)
  • 1,3-Naphthalenedisulfonic acid, 6,6'-[(3,3'-dimethoxy[1,1'-biphenyl]-4,4'-diyl)di(E)-2,1-diazenediyl]bis[4-amino-5-hydroxy-, sodium salt (1:4)
  • 2610-05-1
  • C.I. Direct Blue 1, tetrasodium salt
  • Chloramin Sky Blue
  • Airedale Blue FFD
  • Amanil Sky Blue 6B
  • Amanil Sky Blue FF
  • Atlantic Resin Fast Blue
  • Atlantic Resin Fast Blue LLGG
  • Atlantic Sky Blue 6B
  • Atlantic Sky Blue FF
  • Atul Direct Sky Blue FB
  • Azine Brilliant Blue 6B
  • Azocard Blue 6B
  • Belamine Sky Blue FF
  • Benzanil Sky Blue FF
  • Benzanil Supra Blue 2GN
  • Benzo Brilliant Blue 6BS
  • Brasilamina Sky Blue 6B
  • Brilliant Benzo Blue 6BA-CF
  • Calcodur Blue 6GFL
  • Calcodur Resin Fast Blue
  • Calcodur Resin Fast Blue 6G
  • Calcomine Sky Blue FF
  • Chicago Blue 6B
  • Chicago Sky Blue
  • Chicago Sky Blue 6B
  • Chloramine Sky Blue FF
  • Chlorantine Fast Blue B5GL
  • Chlorazol Sky Blue FF
  • Chrome Leather Sky Blue
  • Chrome Leather Sky Blue GS
  • CI Direct Blue 1
  • Cresotine Blue 6B
  • Diacotton Sky Blue 6B
  • Diaphtamine Blue BS
  • Diazine Sky Blue FF
  • Diazol Pure Blue 6B
  • Diphenyl Brilliant Blue FF
  • Direct Blue 1
  • Direct Blue 6B
  • Direct Blue 6BS
  • Direct Blue FF
  • Direct Blue FFN
  • Direct Bright Blue
  • Direct Brilliant Blue FF
  • Direct Brilliant Blue MFF
  • Direct Brilliant Sky Blue 6B
  • Direct Pure Blue 6B
  • Direct Pure Blue FF
  • Direct Pure Sky Blue
  • Direct Sky Blue 6B
  • Direct Sky Blue 6BS
  • Direct Sky Blue FF
  • Direct Sky Blue Green Shade
  • Direct Sky Blue GS
  • EINECS 220-026-8
  • Enianil Brilliant Blue FF
  • Fastusol Brilliant Blue L8GU
  • Fenamin Sky Blue 3F
  • Fixanol Sky Blue FF
  • Hispamin Sky Blue 6B
  • Ink Blue 6B
  • Japanol Brilliant Blue 6BKX
  • Kayaku Direct Sky Blue 6B
  • Lumicrease Blue 4GL
  • Lumicrease Sky Blue 6GUL
  • Mitsui Direct Brilliant Blue 6B
  • Naphtamine Sky Blue DD
  • 6,8-Naphthalenedisulfonic acid, 3,3'-((3,3'-dimethoxy-4,4'-biphenylene)bis(azo)bis(5-amino-4-hydroxy-, tetrasodium salt
  • NCI-C61109
  • Niagara Sky Blue 6B
  • NSC 51538
  • NSC 9617
  • Nyanza Sky Blue 6B
  • Paper Blue 6B
  • Paramine Sky Blue FF
  • Phenamine Brilliant Blue 6B
  • Pheno Sky Blue 6BX
  • Pontamine Blue
  • Pontamine Sky Blue
  • Pontamine Sky Blue 6x
  • Pontamine Sky Blue 6BX
  • Pontamine Sky Blue 6BX Greenish
  • Pure Blue
  • Pure Sky Blue 6B
  • Pyrazol Blue 2F
  • Pyrazol Fast Brilliant Blue VP
  • Shikiso Direct Sky Blue 6B
  • Sirius Supra Blue 4G
  • Sky Blue 6B
  • Sky Blue FF
  • Solar Blue 4GL
  • Tertrodirect Blue FF
  • Vegentine Blue CSW
  • Vondacel Blue FF
  • Modr Prima 1
  • Pontamine skyblue gbx
  • 755040-57-4


Separation of C.I. Direct Blue 1 on Newcrom R1 HPLC column

February 16, 2018
Separation of C.I. Direct Blue 1 on Newcrom C18 HPLC column

C.I. Direct Blue 1 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 Blue 1
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 by e-mail: support@sielc.com or by phone: 847-229-2629.