C.I. Direct Brown 51

直接棕51

Also known as: Benzoic acid, 5-((4'-((8-((2,4-diaminophenyl)azo)-1-hydroxy-3,6-disulfo-2-naphthalenyl)azo)(1,1'-biphenyl)-4-yl)azo)-2-hydroxy-, trisodium salt, C.I.31710, C.I.Direct Brown 51, C.I.Direct Brown 51:C.I.31710, Diaphtamine Bronze SH, Direct Bronze G, Direct Brown 51

C.I. Direct Brown 51 (CAS 4623-91-0) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C35H23N8Na3O10S2 and a molecular weight of 848.7 g/mol. It is also known as Benzoic acid, 5-((4'-((8-((2,4-diaminophenyl)azo)-1-hydroxy-3,6-disulfo-2-naphthalenyl)azo)(1,1'-biphenyl)-4-yl)azo)-2-hydroxy-, trisodium salt, C.I.31710 and C.I.Direct Brown 51. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 4623-91-0
Jingsj CID: J-668193-3
Molecular Formula: C₃₅H₂₃N₈Na₃O₁₀S₂
Chinese Name: 直接棕51
Molecular Weight: 848.7 g/mol
Category: Organic Compounds
Last updated: 8/21/2026

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Frequently Asked Questions

What is the CAS number of C.I. Direct Brown 51?

The CAS number of C.I. Direct Brown 51 is 4623-91-0.

What are the molecular formula and molecular weight of C.I. Direct Brown 51?

C.I. Direct Brown 51 has molecular formula C35H23N8Na3O10S2 and molecular weight 848.7 g/mol.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "C.I. Direct Brown 51 (CAS 4623-91-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-668193-3 (accessed 2026-10-24).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.