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(R)-(-)-5-(Hydroxymethyl)-2-pyrrolidinone

(R)-(-)-5-羟甲基-2-吡咯烷酮

Also known as: D-Pyroglutaminol, (-)-D-Pyroglutamol, (R)-5-Hydroxymethyl-2-pyrrolidinone, (R)-5-(Hydroxymethyl)-2-pyrrolidinone, 5-Hydroxymethylpyrrolidin-2-one, 5-(Hydroxymethyl)-2-pyrrolidinone, MFCD00077791

(R)-(-)-5-(Hydroxymethyl)-2-pyrrolidinone (CAS 66673-40-3) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C5H9NO2 and a molecular weight of 115.131 g/mol. It is also known as D-Pyroglutaminol, (-)-D-Pyroglutamol and (R)-5-Hydroxymethyl-2-pyrrolidinone. Key properties include a melting point of 83-85ºC(lit.), a boiling point of 346.0±15.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 163.0±20.4 °C. GHS signal word: Warning. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
66673-40-3
Jingsj CID
J-13069-9
Molecular Formula
C5H9NO2
Chinese Name
(R)-(-)-5-羟甲基-2-吡咯烷酮
Molecular Weight
115.131 g/mol
Category
Ketones
Last updated
8/21/2026

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Physicochemical Properties

Melting Point83-85ºC(lit.)
Boiling Point346.0±15.0 °C at 760 mmHg
Density1.2±0.1 g/cm3
Flash Point163.0±20.4 °C

GHS Safety & Compliance

IrritantSignal word: Warning

Frequently Asked Questions

What is the CAS number of (R)-(-)-5-(Hydroxymethyl)-2-pyrrolidinone?

The CAS number of (R)-(-)-5-(Hydroxymethyl)-2-pyrrolidinone is 66673-40-3.

What are the molecular formula and molecular weight of (R)-(-)-5-(Hydroxymethyl)-2-pyrrolidinone?

(R)-(-)-5-(Hydroxymethyl)-2-pyrrolidinone has molecular formula C5H9NO2 and molecular weight 115.131 g/mol.

Is (R)-(-)-5-(Hydroxymethyl)-2-pyrrolidinone hazardous?

(R)-(-)-5-(Hydroxymethyl)-2-pyrrolidinone has GHS signal word Warning.

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

Last updated:

How to cite: Jingsj. "(R)-(-)-5-(Hydroxymethyl)-2-pyrrolidinone (CAS 66673-40-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-13069-9 (accessed 2026-10-22).

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