C.I. Direct Black 4, disodium salt

C.I. Direct Black 4, disodium salt structural formula

CAS Number2429-83-6
Molecular FormulaC35H27N9Na2O7S2
Molecular Weight795.761
  • C.I. Direct Black 4, disodium salt
  • Disodium 4-amino-3-({4'-[(2,4-diamino-5-methylphenyl)diazenyl][1,1'-biphenyl]-4-yl}diazenyl)-5-hydroxy-6-(phenyldiazenyl)naphthalene-2,7-disulfonate
  • 2,7-Naphthalenedisulfonic acid, 4-amino-3-[2-[4'-[2-(2,4-diamino-5-methylphenyl)diazenyl][1,1'-biphenyl]-4-yl]diazenyl]-5-hydroxy-6-(2-phenyldiazenyl)-, sodium salt (1:2)
  • 2429-83-6
  • C.I. Direct Black 4
  • Ahco Direct Black RW
  • Airedale Black RWD
  • Atlantic Black RW
  • Azine Deep Black 3RL
  • Azocard Black RW
  • Bencidal Black RW
  • Benzanil Black RW
  • Benzo Deep Black RW
  • Benzo Leather Black RW
  • Black 3EMBL
  • Carbide Black ER
  • Carbide Black FC
  • Chloramine Black E2B
  • Chloramine Black W
  • Chlorazol Black LF
  • Chlorazol Black LFA
  • Chrome Leather Black ER
  • Chrome Leather Black FC
  • CI Direct Black 4
  • CI Direct Black 4, disodium salt
  • Coir Deep Black R
  • Cotton Black MT
  • Diamine Deep Black RW
  • Diamine Direct Black RW
  • Diaphtamine Black MT
  • Diazine Direct Black R
  • Diazine Direct Black BR
  • Diazo Black RW
  • Diazol Black ER
  • Diazol Black ERN
  • Diphenyl Deep Black VN
  • Direct Black K
  • Direct Black R
  • Direct Black 3RX
  • Direct Black 4RX
  • Direct Black MR
  • Direct Black RW
  • Direct Black RWN
  • Direct Deep Black RW
  • Direct Deep Black RWA-CF
  • Direct Diazo Black RW
  • EINECS 219-392-1
  • Enianil Black RCN
  • Erie Black RB
  • Erie Black RF
  • Erie Black RRAC
  • Erie Black RW
  • Erie Black RX
  • Fenamin Black RW
  • Formic Black MTR
  • Hispamin Black 3RX
  • 2,7-Naphthalenedisulfonic acid, 4-amino-3-((4'-((2,4-diamino-5-methylphenyl)azo)(1,1'-biphenyl)-4-yl)azo)-5-hydroxy-6-(pheylazo)-, disodium salt
  • Nippon Deep Black 3RL
  • Nippon Deep Black RL
  • Nippon Deep Black RL Extra
  • NSC 73417
  • Paper Black RW
  • Paper Deep Black R
  • Paraldehyde Black RW
  • Phenamine Black RW
  • Pontamine Black RR
  • Pontamine Black RRX
  • Tertrodirect Black RW
  • Tetrazo Deep Black R
  • Vondacel Black RW
  • 27177-63-5


Separation of C.I. Direct Black 4, disodium salt on Newcrom R1 HPLC column

February 16, 2018
Separation of C.I. Direct Black 4, disodium salt on Newcrom C18 HPLC column

C.I. Direct Black 4, disodium salt 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 Black 4, disodium salt
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.