4-(methylsulfonyl)benzene-1,2-diamine

Also known as: 1,2-diamino-4-(methylsulfonyl)benzene, 4-methylsulfonyl-1,2-diaminobenzene, 4-methanesulfonylbenzene-1,2-diamine, 4-methylsulfonyl-o-phenylenediamine, 4-methylsulfonyl-ortho-phenylenediamine, 4-methylsulfonylbenzene-1,2-diamine, 3,4-diaminophenyl methyl sulfone, 4-(methylsulphonyl)benzene-1,2-diamine

4-(methylsulfonyl)benzene-1,2-diamine (CAS 21731-57-7) is a compound in the Organic Bases category listed in the Jingsj chemical database. It has the molecular formula C7H10N2O2S and a molecular weight of 186.23100 g/mol. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 21731-57-7
Jingsj CID: J-1042370-8
Molecular Formula: C₇H₁₀N₂O₂S
Molecular Weight: 186.23100 g/mol
Category: Organic Bases
Last updated: 8/21/2026

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Physicochemical Properties

Exact Mass	186.04600
PSA	94.56000
LogP	2.49770

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 4-(methylsulfonyl)benzene-1,2-diamine?

The CAS number of 4-(methylsulfonyl)benzene-1,2-diamine is 21731-57-7.

What are the molecular formula and molecular weight of 4-(methylsulfonyl)benzene-1,2-diamine?

4-(methylsulfonyl)benzene-1,2-diamine has molecular formula C7H10N2O2S and molecular weight 186.23100 g/mol.

What are the upstream and downstream products of 4-(methylsulfonyl)benzene-1,2-diamine?

For 4-(methylsulfonyl)benzene-1,2-diamine, Upstream Products: 4-(Methylsulfonyl)-2-nitroaniline, 4-(Methylsulfanyl)-2-nitroaniline.

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. "4-(methylsulfonyl)benzene-1,2-diamine (CAS 21731-57-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1042370-8 (accessed 2026-11-09).

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