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N-acetyl Dapsone

Also known as: 4'-Sulfanilylacetanilide, 4’-sulfanilyl-acetanilid, 4’-sulfanilylacetanilide, Acetanilide, 4'-sulfanilyl-, Dapsone Impurity 2（Monoacetyl Dapsone）, MONO-N-ACETYL-4,4'-SULFONYLBISBENZENEAMINE, MONOACETYL DAPSONE, Madds, Mono-N-acetyl-4-4'-sulfonylbisbenzeneamine, N-Acetyl Dapsone, N-MONOACETYL-4,4'-DIAMINODIPHENYL SULFONE, N-[4-(4-aminophenyl)sulfonylphenyl]acetamide

N-acetyl Dapsone (CAS 565-20-8) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C14H14N2O3S and a molecular weight of 290.34 g/mol. Key properties include a melting point of 238-240ºC, a boiling point of 589.5ºC at 760mmHg, a density of 1.362g/cm3 and a flash point of 310.3ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
565-20-8
Jingsj CID
J-90057-2
Molecular Formula
C14H14N2O3S
Molecular Weight
290.34 g/mol
Category
Aromatic Hydrocarbons
Last updated
8/21/2026
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Physicochemical Properties

Melting Point238-240ºC
Boiling Point589.5ºC at 760mmHg
Density1.362g/cm3
Flash Point310.3ºC
Exact Mass290.07300
PSA97.64000
LogP3.79500
Refractive Index1.641
Storage Conditions2-8°C

Activity & Biological Data

Additional Information[1]. Tanaka K, et al. Mutagenicity of N-acetyl and N,N'-diacetyl derivatives of 3 aromatic amines used as epoxy-resin hardeners. Mutat Res. 1985 May-Jun;143(1-2):11-5. [2]. Bonde S L, et al. Simultaneous determination of dapsone and its major metabolite N-Acetyl Dapsone by LC-MS/MS method. Int. J. Pharm. Pharm. Sci, 2013, 5: 441-446.

Frequently Asked Questions

What is the CAS number of N-acetyl Dapsone?

The CAS number of N-acetyl Dapsone is 565-20-8.

What are the molecular formula and molecular weight of N-acetyl Dapsone?

N-acetyl Dapsone has molecular formula C14H14N2O3S and molecular weight 290.34 g/mol.

What are the upstream and downstream products of N-acetyl Dapsone?

For N-acetyl Dapsone, Upstream Products: 1-Bromo-4-nitrobenzene, 4-[(4-nitrophenyl)sulfanyl]aniline, 4-Acetamidobenzenesulfinic acid; Downstream Products: 4,4'-Diaminodiphenylsulfone.

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

Last updated:

How to cite: Jingsj. "N-acetyl Dapsone (CAS 565-20-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-90057-2 (accessed 2026-11-09).

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