(S)-4-Hydroxy-2-pyrrolidinone

Also known as: (4S)-4-Hydroxypyrrolidin-2-one, (4S)-4-hydroxy-2-pyrrolidinone, (S)-(-)-4-Hydroxy-2-pyrrolidinone, (S)-(-)-4-Hydroxy-2-pyrrolidone, (S)-4-Hydroxy-pyrrolidine-2-one, (S)-β-hydroxy-γ-butyrolactam, 2-Pyrrolidinone, 4-hydroxy-, (4S)-, 2-Pyrrolidinone, 4-hydroxy-, (S)-, 4-Hydroxy-2-pyrrolidinone, 4-Hydroxypyrrolidin-2-one, 4-Hydroxypyrrolidine-2-one, 4-hydroxy-2-oxopyrrolidine, 4-hydroxy-2-pyrrolidone, MFCD00273370

(S)-4-Hydroxy-2-pyrrolidinone (CAS 68108-18-9) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C4H7NO2 and a molecular weight of 101.10 g/mol. Key properties include a melting point of 156-160 °C, a boiling point of 363.6±35.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 173.7±25.9 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 68108-18-9
Jingsj CID: J-1993300-7
Molecular Formula: C₄H₇NO₂
Molecular Weight: 101.10 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	156-160 °C
Boiling Point	363.6±35.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	173.7±25.9 °C
Exact Mass	101.047676
PSA	49.33000
LogP	-2.55
Vapor Pressure	0.0±1.8 mmHg at 25°C
Refractive Index	1.513

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 (S)-4-Hydroxy-2-pyrrolidinone?

The CAS number of (S)-4-Hydroxy-2-pyrrolidinone is 68108-18-9.

What are the molecular formula and molecular weight of (S)-4-Hydroxy-2-pyrrolidinone?

(S)-4-Hydroxy-2-pyrrolidinone has molecular formula C4H7NO2 and molecular weight 101.10 g/mol.

What are the upstream and downstream products of (S)-4-Hydroxy-2-pyrrolidinone?

For (S)-4-Hydroxy-2-pyrrolidinone, Downstream Products: (R)-4-Acetylthio-2-pyrrolidinone.

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. "(S)-4-Hydroxy-2-pyrrolidinone (CAS 68108-18-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1993300-7 (accessed 2026-11-09).

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