1-(4-Methylphenyl)-1H-pyrrole-2,5-dione

Also known as: p-Tolylmaleimide, 1-(p-Tolyl)-1H-pyrrole-2,5-dione, N-(p-Tolyl)maleimide, N-(4-Methylphenyl)maleimide, N-4-Tolylmaleimide, IT 510, Maleimide, N-p-Tolyl-, n-p-tolyl-maleimid

1-(4-Methylphenyl)-1H-pyrrole-2,5-dione (CAS 1631-28-3) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C11H9NO2 and a molecular weight of 187.19500 g/mol. Key properties include a boiling point of 333.2ºC at 760mmHg, a density of 1.277g/cm3 and a flash point of 154.2ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 1631-28-3
Jingsj CID: J-20686-0
Molecular Formula: C₁₁H₉NO₂
Molecular Weight: 187.19500 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	333.2ºC at 760mmHg
Density	1.277g/cm3
Flash Point	154.2ºC
Exact Mass	187.06300
PSA	37.38000
LogP	1.48940
Vapor Pressure	0.000139mmHg at 25°C
Refractive Index	1.615

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-Methylphenyl)-1H-pyrrole-2,5-dione?

The CAS number of 1-(4-Methylphenyl)-1H-pyrrole-2,5-dione is 1631-28-3.

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

1-(4-Methylphenyl)-1H-pyrrole-2,5-dione has molecular formula C11H9NO2 and molecular weight 187.19500 g/mol.

What are the upstream and downstream products of 1-(4-Methylphenyl)-1H-pyrrole-2,5-dione?

For 1-(4-Methylphenyl)-1H-pyrrole-2,5-dione, Upstream Products: Maleic anhydride, p-Toluidine, (Z)-4-[(4-methylphenyl)amino]-4-oxo-2-butenoic acid; Downstream Products: Tricyclo[5.2.1.02,6]deca-3,8-diene, DL-Malic acid.

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-Methylphenyl)-1H-pyrrole-2,5-dione (CAS 1631-28-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-20686-0 (accessed 2026-11-09).

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