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(2S)-1-[(2S)-3-(Acetylthio)-2-methyl-1-oxopropyl]-L-proline

1-[(2S)-3-(乙酰硫代)-2-甲基-1-氧代丙基]-L-脯氨酸

Also known as: Captopril EP Impurity J, 1-[(2S)-3-(Acetylsulfanyl)-2-methylpropanoyl]-L-proline, (S)-3-Acetylthio-2-methylpropionyl-L-proline, Acetylcaptopril, N-[3-(Acetylthio)-(2S)-methylpropionyl]-L-proline, EINECS 265-250-7

(2S)-1-[(2S)-3-(Acetylthio)-2-methyl-1-oxopropyl]-L-proline (CAS 64838-55-7) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C11H17NO4S and a molecular weight of 259.322 g/mol. It is also known as Captopril EP Impurity J, 1-[(2S)-3-(Acetylsulfanyl)-2-methylpropanoyl]-L-proline and (S)-3-Acetylthio-2-methylpropionyl-L-proline. Key properties include a melting point of 76-82 °C(lit.), a boiling point of 464.8±40.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 234.9±27.3 °C. GHS signal word: Warning. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
64838-55-7
Jingsj CID
J-47639-9
Molecular Formula
C11H17NO4S
Chinese Name
1-[(2S)-3-(乙酰硫代)-2-甲基-1-氧代丙基]-L-脯氨酸
Molecular Weight
259.322 g/mol
Category
Organic Acids
Last updated
8/21/2026

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Physicochemical Properties

Melting Point76-82 °C(lit.)
Boiling Point464.8±40.0 °C at 760 mmHg
Density1.3±0.1 g/cm3
Flash Point234.9±27.3 °C

GHS Safety & Compliance

IrritantSignal word: Warning

Frequently Asked Questions

What is the CAS number of (2S)-1-[(2S)-3-(Acetylthio)-2-methyl-1-oxopropyl]-L-proline?

The CAS number of (2S)-1-[(2S)-3-(Acetylthio)-2-methyl-1-oxopropyl]-L-proline is 64838-55-7.

What are the molecular formula and molecular weight of (2S)-1-[(2S)-3-(Acetylthio)-2-methyl-1-oxopropyl]-L-proline?

(2S)-1-[(2S)-3-(Acetylthio)-2-methyl-1-oxopropyl]-L-proline has molecular formula C11H17NO4S and molecular weight 259.322 g/mol.

Is (2S)-1-[(2S)-3-(Acetylthio)-2-methyl-1-oxopropyl]-L-proline hazardous?

(2S)-1-[(2S)-3-(Acetylthio)-2-methyl-1-oxopropyl]-L-proline 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. "(2S)-1-[(2S)-3-(Acetylthio)-2-methyl-1-oxopropyl]-L-proline (CAS 64838-55-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-47639-9 (accessed 2026-10-23).

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