1-(4-anilinonaphthalen-1-yl)pyrrole-2,5-dione

Also known as: N-(4-anilino-1-naphthyl)maleimide, N-(1-anilinonaphthyl-4)-maleimide, N-maleimido-N'-phenyl-1,4-naphthalenediamine, 1-(4-(phenylamino)-1-naphthalenyl)-1H-pyrrole-2,5-dione, ANM, MFCD00042694, EINECS 256-618-8

1-(4-anilinonaphthalen-1-yl)pyrrole-2,5-dione (CAS 50539-45-2) is a compound in the Organic Bases category listed in the Jingsj chemical database. It has the molecular formula C20H14N2O2 and a molecular weight of 314.33700 g/mol. Key properties include a melting point of 207ºC, a boiling point of 521.6ºC at 760 mmHg, a density of 1.364g/cm3 and a flash point of 269.3ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 50539-45-2
Jingsj CID: J-46080-8
Molecular Formula: C₂₀H₁₄N₂O₂
Molecular Weight: 314.33700 g/mol
Category: Organic Bases
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	207ºC
Boiling Point	521.6ºC at 760 mmHg
Density	1.364g/cm3
Flash Point	269.3ºC
Exact Mass	314.10600
PSA	49.41000
LogP	4.15080
Refractive Index	1.746

Activity & Biological Data

Additional Information	[1]. T Honda, et al. Characterization of the reactivity of sulphydryl groups in tryptophanase by a dual-monitoring high-performance liquid chromatographic system with a site-directed fluorescent reagent. J Chromatogr. 1986 Dec 26;371:353-60. [2]. S Chaen, et al. Fluorescence properties and contraction characteristics of ANM (N-(1-anilinonaphthyl-4)maleimide)-labeled rabbit psoas muscle fibers. J Biochem. 1985 Oct;98(4):939-47.

Additional Information

[1]. T Honda, et al. Characterization of the reactivity of sulphydryl groups in tryptophanase by a dual-monitoring high-performance liquid chromatographic system with a site-directed fluorescent reagent. J Chromatogr. 1986 Dec 26;371:353-60. [2]. S Chaen, et al. Fluorescence properties and contraction characteristics of ANM (N-(1-anilinonaphthyl-4)maleimide)-labeled rabbit psoas muscle fibers. J Biochem. 1985 Oct;98(4):939-47.

Customs & Trade Information

HS Code	2925190090
Summary	2925190090 other imides 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 1-(4-anilinonaphthalen-1-yl)pyrrole-2,5-dione?

The CAS number of 1-(4-anilinonaphthalen-1-yl)pyrrole-2,5-dione is 50539-45-2.

What are the molecular formula and molecular weight of 1-(4-anilinonaphthalen-1-yl)pyrrole-2,5-dione?

1-(4-anilinonaphthalen-1-yl)pyrrole-2,5-dione has molecular formula C20H14N2O2 and molecular weight 314.33700 g/mol.

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. "1-(4-anilinonaphthalen-1-yl)pyrrole-2,5-dione (CAS 50539-45-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-46080-8 (accessed 2026-11-06).

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