Sodium 4-aminoazobenzene-4'-sulfonate

4-氨基偶氮苯-4'-磺酸钠盐

Also known as: Benzenesulfonic acid, 4-[2-(4-aminophenyl)diazenyl]-, sodium salt (1:1), sodium 4-[(4-aminophenyl)diazenyl]benzenesulfonate, 4-Aminoazobenzene-4'-sulfonic Acid Sodium Salt, 4-Aminoazobenzene-4'-sodium sulfonate, 4'-amino-4-sulfoazobenzene sodium salt, Acid yellow fwa, New Yellow GMF, C.I.13010, EINECS 219-657-1, MFCD00035564

Sodium 4-aminoazobenzene-4'-sulfonate (CAS 2491-71-6) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C12H11N3NaO3S+ and a molecular weight of 300.28900 g/mol. It is also known as Benzenesulfonic acid, 4-[2-(4-aminophenyl)diazenyl]-, sodium salt (1:1), sodium 4-[(4-aminophenyl)diazenyl]benzenesulfonate and 4-Aminoazobenzene-4'-sulfonic Acid Sodium Salt. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 2491-71-6
Jingsj CID: J-34734-1
Molecular Formula: C₁₂H₁₁N₃NaO₃S
Chinese Name: 4-氨基偶氮苯-4'-磺酸钠盐
Molecular Weight: 300.28900 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Frequently Asked Questions

What is the CAS number of Sodium 4-aminoazobenzene-4'-sulfonate?

The CAS number of Sodium 4-aminoazobenzene-4'-sulfonate is 2491-71-6.

What are the molecular formula and molecular weight of Sodium 4-aminoazobenzene-4'-sulfonate?

Sodium 4-aminoazobenzene-4'-sulfonate has molecular formula C12H11N3NaO3S+ and molecular weight 300.28900 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. "Sodium 4-aminoazobenzene-4'-sulfonate (CAS 2491-71-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-34734-1 (accessed 2026-10-23).

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