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4-Amino-1,3-benzenedisulfonic acid

Also known as: Aniline-2,4-disulfonic acid, 4-Aminobenzene-1,3-disulfonic acid, 4-Aminobenzene-1,3-disulphonic acid, Aniline-2,4-disulphonic acid, EINECS 205-299-3, MFCD00035903

4-Amino-1,3-benzenedisulfonic acid (CAS 137-51-9) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C6H7NO6S2 and a molecular weight of 253.25300 g/mol. Key property: a density of 1.844 g/cm3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
137-51-9
Jingsj CID
J-23923-6
Molecular Formula
C6H7NO6S2
Molecular Weight
253.25300 g/mol
Category
Organic Acids
Last updated
8/21/2026
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Physicochemical Properties

Density1.844 g/cm3
Exact Mass252.97100
PSA151.52000
LogP2.50500
Refractive Index1.666

Customs & Trade Information

HS Code2921499090
Summary2921499090 other aromatic monoamines and their derivatives; salts thereof VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 4-Amino-1,3-benzenedisulfonic acid?

The CAS number of 4-Amino-1,3-benzenedisulfonic acid is 137-51-9.

What are the molecular formula and molecular weight of 4-Amino-1,3-benzenedisulfonic acid?

4-Amino-1,3-benzenedisulfonic acid has molecular formula C6H7NO6S2 and molecular weight 253.25300 g/mol.

What are the upstream and downstream products of 4-Amino-1,3-benzenedisulfonic acid?

For 4-Amino-1,3-benzenedisulfonic acid, Upstream Products: 2(1H)-Pyridone, Cyanuric chloride, Sulfanilic acid; Downstream Products: 3,5-Dibromosulfanilic acid sodium salt.

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

Last updated:

How to cite: Jingsj. "4-Amino-1,3-benzenedisulfonic acid (CAS 137-51-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-23923-6 (accessed 2026-11-09).

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