Oxamine Blue 4R

指示蓝4R

Also known as: Direct Blue 3, C.I. 23705, C.I. Direct Blue 3, Erie Violet 2B, EINECS 219-383-2, disodium 3-[[4'-[(6-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-4-hydroxynaphthalene-1-sulphonate, 3-[[4'-[(6-Amino-1-hydroxy-3-sulfo-2-naphtyl)azo]-3,3'-dimethyl-1,1'-biphenyl-4-yl]azo]-4-hydroxy-1-naphthalenesulfonic acid disodium salt

Oxamine Blue 4R (CAS 2429-72-3) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C34H25N5Na2O8S2 and a molecular weight of 741.70100 g/mol. It is also known as Direct Blue 3, C.I. 23705 and C.I. Direct Blue 3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 2429-72-3
Jingsj CID: J-49558-1
Molecular Formula: C₃₄H₂₅N₅Na₂O₈S₂
Chinese Name: 指示蓝4R
Molecular Weight: 741.70100 g/mol
Category: Organic Compounds
Last updated: 8/21/2026

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Frequently Asked Questions

What is the CAS number of Oxamine Blue 4R?

The CAS number of Oxamine Blue 4R is 2429-72-3.

What are the molecular formula and molecular weight of Oxamine Blue 4R?

Oxamine Blue 4R has molecular formula C34H25N5Na2O8S2 and molecular weight 741.70100 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. "Oxamine Blue 4R (CAS 2429-72-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-49558-1 (accessed 2026-10-23).

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