Direct Black 19

直接黑19

Also known as: Direct Fast Black G, Black G, Direct black RN, Atul Direct Black VG, Benzo Fast Black G, Condires Black AN, Kayarus Black G, Sumilight Black G, Vicorect Black FB, disodium 4-amino-3,6-bis[[4-[(2,4-diaminophenyl)azo]phenyl]azo]-5-hydroxynaphthalene-2,7-disulphonate, 2,7-Naphthalenedisulfonic acid, 4-amino-3,6-bis[(E)-2-[4-[(E)-2-(2,4-diaminophenyl)diazenyl]phenyl]diazenyl]-5-hydroxy-, sodium salt (1:2), Disodium 4-amino-3,6-bis[(E)-{4-[(E)-(2,4-diaminophenyl)diazenyl]phenyl}diazenyl]-5-hydroxy-2,7-naphthalenedisulfonate, RIFAZOLBLACKGR, EINECS 229-208-1

Direct Black 19 (CAS 6428-31-5) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C34H27N13Na2O7S2 and a molecular weight of 839.771 g/mol. It is also known as Direct Fast Black G, Black G and Direct black RN. Key property: a density of 1.727g/cm3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

6428-31-5

Jingsj CID

J-23933-0

Molecular Formula

C₃₄H₂₇N₁₃Na₂O₇S₂

Chinese Name

直接黑19

Molecular Weight

839.771 g/mol

Category

Organic Compounds

Last updated

8/21/2026