2-(4-Aminoanilino)-5-nitrobenzenesulphonic acid

Also known as: 4-Amino-4'-nitrodiphenylamine-2'-sulfonic acid, 4-Nitro-4'-aminodiphenylamine-2-sulfonic acid, 2-(p-Aminoanilino)-5-nitrobenzenesulfonic acid, 2-[(4-Aminophenyl)amino]-5-nitrobenzenesulfonic acid, 4'-Amino-4-nitrodiphenylamine-2-sulfonic acid, 4-Nitro-4-aminodiphenylamine-2-sulfonate, Aminoaniline nitrobenzenesulphonic acid, MFCD00035932, EINECS 202-057-9

2-(4-Aminoanilino)-5-nitrobenzenesulphonic acid (CAS 91-29-2) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C12H11N3O5S and a molecular weight of 309.29800 g/mol. Key properties include a melting point of 140-142 and a density of 1.607g/cm3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 91-29-2
Jingsj CID: J-14508-4
Molecular Formula: C₁₂H₁₁N₃O₅S
Molecular Weight: 309.29800 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	140-142
Density	1.607g/cm3
Exact Mass	309.04200
PSA	146.62000
LogP	4.42550
Refractive Index	1.709

Customs & Trade Information

HS Code	2921590090
Summary	2921590090. other aromatic polyamines and their derivatives; salts thereof. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 2-(4-Aminoanilino)-5-nitrobenzenesulphonic acid?

The CAS number of 2-(4-Aminoanilino)-5-nitrobenzenesulphonic acid is 91-29-2.

What are the molecular formula and molecular weight of 2-(4-Aminoanilino)-5-nitrobenzenesulphonic acid?

2-(4-Aminoanilino)-5-nitrobenzenesulphonic acid has molecular formula C12H11N3O5S and molecular weight 309.29800 g/mol.

What are the upstream and downstream products of 2-(4-Aminoanilino)-5-nitrobenzenesulphonic acid?

For 2-(4-Aminoanilino)-5-nitrobenzenesulphonic acid, Upstream Products: p-Phenylenediamine; Downstream Products: N1-(4-nitrophenyl)benzene-1,4-diamine.

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

Last updated: 8/21/2026

How to cite: Jingsj. "2-(4-Aminoanilino)-5-nitrobenzenesulphonic acid (CAS 91-29-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-14508-4 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.