1-(4-methylphenyl)sulfonylpyrrolidin-2-one

N-甲苯磺酰基吡咯烷酮

Also known as: 1-Tosylpyrrolidin-2-one, 1-Tosylpyrrolidine-2-one, N-Tosylpyrrolidone, 2-Pyrrolidinone, 1-[(4-methylphenyl)sulfonyl]-, 1-(p-Tolylsulfonyl)-2-pyrrolidone, 1-(4-Methylbenzenesulfonyl)-2-pyrrolidinone, 1-(p-Toluenesulfonyl)-2-pyrrolidinone

1-(4-methylphenyl)sulfonylpyrrolidin-2-one (CAS 10019-95-1) is a compound in the Solvents category listed in the Jingsj chemical database. It has the molecular formula C11H13NO3S and a molecular weight of 239.29100 g/mol. It is also known as 1-Tosylpyrrolidin-2-one, 1-Tosylpyrrolidine-2-one and N-Tosylpyrrolidone. Key properties include a boiling point of 382.8ºC at 760mmHg, a density of 1.33g/cm3 and a flash point of 185.3ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 10019-95-1
Jingsj CID: J-1993777-3
Molecular Formula: C₁₁H₁₃NO₃S
Chinese Name: N-甲苯磺酰基吡咯烷酮
Molecular Weight: 239.29100 g/mol
Category: Solvents
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	382.8ºC at 760mmHg
Density	1.33g/cm3
Flash Point	185.3ºC
Exact Mass	239.06200
PSA	62.83000
LogP	2.32480
Vapor Pressure	4.59E-06mmHg at 25°C
Refractive Index	1.589

Customs & Trade Information

HS Code	2933790090
Summary	2933790090. other lactams. VAT:17.0%. Tax rebate rate:9.0%. . MFN tariff:9.0%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of 1-(4-methylphenyl)sulfonylpyrrolidin-2-one?

The CAS number of 1-(4-methylphenyl)sulfonylpyrrolidin-2-one is 10019-95-1.

What are the molecular formula and molecular weight of 1-(4-methylphenyl)sulfonylpyrrolidin-2-one?

1-(4-methylphenyl)sulfonylpyrrolidin-2-one has molecular formula C11H13NO3S and molecular weight 239.29100 g/mol.

What are the upstream and downstream products of 1-(4-methylphenyl)sulfonylpyrrolidin-2-one?

For 1-(4-methylphenyl)sulfonylpyrrolidin-2-one, Upstream Products: 2-Pyrrolidinone, p-Toluenesulfonyl chloride, Pentafluorobenzaldehyde; Downstream Products: 2-Pyrrolidinone, 1-[(4-Methylphenyl)sulfonyl]pyrrolidine.

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

Last updated: 8/21/2026

How to cite: Jingsj. "1-(4-methylphenyl)sulfonylpyrrolidin-2-one (CAS 10019-95-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1993777-3 (accessed 2026-10-28).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.