Description

S-Methyl-L-Cysteine Sulfoxide is a naturally occurring sulfur-containing amino acid derivative, also known as methiin. This compound is a key intermediate in the biosynthesis of various sulfur metabolites and is of significant interest for its role in plant biochemistry and potential bioactivity. It serves as a crucial research chemical and building block for scientists and manufacturers in the life sciences. Primary applications include use as a reference standard in analytical chemistry, a precursor in pharmaceutical research, and a component in studies of flavor and aroma development, particularly in Allium species like garlic and onions.

Application

• Pharmaceutical Research & Development: Used as a high-purity intermediate or reference standard in the synthesis and study of novel therapeutic agents and metabolic pathways.
• Analytical Chemistry: Serves as a critical calibration standard and internal standard in HPLC, LC-MS, and other chromatographic methods for quantifying sulfur compounds.
• Nutraceutical & Food Science: Employed in research to understand the formation of flavor precursors, health-promoting compounds, and the biochemistry of Allium vegetables.
• Biochemical Studies: Acts as a substrate or inhibitor in enzymatic studies related to sulfur metabolism and amino acid conversion in plants and microorganisms.
• Cosmetic & Personal Care Research: Investigated for potential applications in formulations targeting skin health due to its sulfur-based antioxidant properties.
• Agricultural Chemistry: Studied for its role in plant defense mechanisms and as a potential biostimulant or natural pesticide precursor.

Basic Information

Product Name	S-Methyl-L-Cysteine Sulfoxide
CAS No.	6853-87-8
Molecular Formula	C4H9NO3S2
Molecular Weight	183.25 g/mol
Synonyms	Methiin; S-Methylcysteine sulfoxide; L-Methionine sulfoxide (specific isomer); (RS,S)-S-Methylcysteine sulfoxide; S-Methyl-L-cysteine S-oxide; 3-(Methylsulfinyl)-L-alanine; Alliin (note: Alliin is a specific stereoisomer); S-Allyl-L-cysteine sulfoxide analog
EINECS	229-943-8

Quality Control

Our S-Methyl-L-Cysteine Sulfoxide is produced under strict quality management systems. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. We provide full traceability and Certificates of Analysis (COA) are available for all shipments, detailing key parameters such as assay, chiral purity, and impurity profiles. Our quality commitment aligns with the standards required for research and development applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and should be handled in a dry environment to prevent degradation. For long-term storage, consider desiccants or inert atmosphere.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Chiral Purity (HPLC)	≥ 99.0% L-Isomer
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.