D-Methionine

Also known as: (R)-2-Amino-4-(methylthio)butyric acid, D-2-Amino-4-(methylthio)butanoic acid, H-D-Met-OH, (2R)-2-amino-4-methylsulfanylbutanoic acid, (R)-Methionine, MRX-1024, D-Banthionine, D-Lobamine

D-Methionine (CAS 348-67-4) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C5H11NO2S and a molecular weight of 149.211 g/mol. Key properties include a melting point of 273-275ºC, a boiling point of 306.9±37.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 139.4±26.5 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 348-67-4
Jingsj CID: J-39687-2
Molecular Formula: C₅H₁₁NO₂S
Molecular Weight: 149.211 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	273-275ºC
Boiling Point	306.9±37.0 °C at 760 mmHg
Density	1.2±0.1 g/cm3
Flash Point	139.4±26.5 °C
Exact Mass	149.051056
PSA	88.62000
LogP	0.37
Vapor Pressure	0.0±1.4 mmHg at 25°C
Refractive Index	1.531
Storage Conditions	2~8°C

Activity & Biological Data

Target	GABAA receptor[1]
Additional Information	[1]. Wu C, et al. Antioxidants L-carnitine and D-methionine modulate neuronal activity through GABAergic inhibition. J Neural Transm (Vienna). 2014 Jul;121(7):683-93. [2]. Sooriyaarachchi M, et al. Chemoprotection by D-methionine against cisplatin-induced side-effects: insight from in vitrostudies using human plasma. Metallomics. 2014 Mar;6(3):532-41. [3]. Hinduja S, et al. D-methionine protects against cisplatin-induced neurotoxicity in the hippocampus of the adult rat. Neurotox Res. 2015 Apr;27(3):199-204.

Target

GABAA receptor[1]

Additional Information

[1]. Wu C, et al. Antioxidants L-carnitine and D-methionine modulate neuronal activity through GABAergic inhibition. J Neural Transm (Vienna). 2014 Jul;121(7):683-93. [2]. Sooriyaarachchi M, et al. Chemoprotection by D-methionine against cisplatin-induced side-effects: insight from in vitrostudies using human plasma. Metallomics. 2014 Mar;6(3):532-41. [3]. Hinduja S, et al. D-methionine protects against cisplatin-induced neurotoxicity in the hippocampus of the adult rat. Neurotox Res. 2015 Apr;27(3):199-204.

Customs & Trade Information

HS Code	2930909090
Summary	2930909090. other organo-sulphur compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of D-Methionine?

The CAS number of D-Methionine is 348-67-4.

What are the molecular formula and molecular weight of D-Methionine?

D-Methionine has molecular formula C5H11NO2S and molecular weight 149.211 g/mol.

What are the upstream and downstream products of D-Methionine?

For D-Methionine, Upstream Products: DL-Methionine, N-Acetyl-D-methionine, Z-L-Methionine; Downstream Products: DL-Methioninol, Methyl D-methioninate, D(-)-Glutamic acid.

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. "D-Methionine (CAS 348-67-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-39687-2 (accessed 2026-11-09).

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