L-Cystathionine

Also known as: (R)-S-(2-Amino-2-carboxyethyl)-L-homocysteine, S-[(2R)-2-Amino-2-carboxyethyl]-L-homocysteine, (2S)-2-Amino-4-{[(2R)-2-amino-2-carboxyethyl]thio}butanoic acid, (2S)-2-amino-4-[(2R)-2-amino-3-hydroxy-3-oxopropyl]sulfanylbutanoic acid, L-(+)-Cystathionine, Cystathionine, L-, EINECS 200-295-8, MFCD00036685

L-Cystathionine (CAS 56-88-2) is a compound in the Ethers category listed in the Jingsj chemical database. It has the molecular formula C7H14N2O4S and a molecular weight of 222.262 g/mol. Key properties include a melting point of 312ºC, a boiling point of 481.0±45.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 244.7±28.7 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 56-88-2
Jingsj CID: J-31992-4
Molecular Formula: C₇H₁₄N₂O₄S
Molecular Weight: 222.262 g/mol
Category: Ethers
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	312ºC
Boiling Point	481.0±45.0 °C at 760 mmHg
Density	1.4±0.1 g/cm3
Flash Point	244.7±28.7 °C
Exact Mass	222.067429
PSA	151.94000
LogP	-0.13
Vapor Pressure	0.0±2.6 mmHg at 25°C
Refractive Index	1.592

Activity & Biological Data

Target	Human Endogenous Metabolite
Additional Information	[1]. Amino Y, et al. Synthesis and evaluation of L-cystathionine as a standard for amino acid analysis. Biosci Biotechnol Biochem. 2017 Jan;81(1):95-101.

Frequently Asked Questions

What is the CAS number of L-Cystathionine?

The CAS number of L-Cystathionine is 56-88-2.

What are the molecular formula and molecular weight of L-Cystathionine?

L-Cystathionine has molecular formula C7H14N2O4S and molecular weight 222.262 g/mol.

What are the upstream and downstream products of L-Cystathionine?

For L-Cystathionine, Upstream Products: L-Cystine, L-Homocysteine, 3-Chloro-L-alanine hydrochloride; Downstream Products: L-Homocysteine, Pyruvic acid, L-Cysteine.

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. "L-Cystathionine (CAS 56-88-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-31992-4 (accessed 2026-11-07).

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