Chlorazol Black LF

Also known as: Direct Black 4, Direct Black RW, C.I. Direct Black 4, disodium 4-amino-3-[[4'-[(2,4-diamino-5-methylphenyl)azo][1,1'-biphenyl]-4-yl]azo]-5-hydroxy-6-(phenylazo)naphthalene-2,7-disulphonate, Ahco Direct Black RW, Erie Black RB, Erie Black RF, Erie Black RW, Erie Black RX, Diazo Black RW, Direct Black K, Direct Black R, Paper Black RW, Black 3EMBL

Chlorazol Black LF (CAS 2429-83-6) is a compound in the Organohalogen Compounds category listed in the Jingsj chemical database. It has the molecular formula C35H27N9Na2O7S2 and a molecular weight of 795.75500 g/mol. Key property: a density of 1.58g/cm3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

2429-83-6

Jingsj CID

J-1519652-9

Molecular Formula

C₃₅H₂₇N₉Na₂O₇S₂

Molecular Weight

795.75500 g/mol

Category

Organohalogen Compounds

Last updated

8/21/2026