Description

L-Cysteine, 2-Methyl- (9Ci) is a specialized, non-proteinogenic derivative of the essential amino acid cysteine, characterized by a methyl substitution at the 2-position. This structural modification imparts unique chemical properties, making it a valuable chiral building block and intermediate in advanced organic synthesis and pharmaceutical research. It is primarily utilized by research institutions and industrial R&D departments focused on developing novel bioactive compounds, peptide mimetics, and high-value fine chemicals.

Application

• Pharmaceutical Intermediate: Serves as a key chiral synthon in the research and development of new drug candidates, particularly for protease inhibitors and other targeted therapies.
• Peptide Chemistry: Used in the synthesis of modified peptides and peptidomimetics to study structure-activity relationships and enhance metabolic stability.
• Biochemical Research: Employed as a substrate or inhibitor in enzymatic studies to investigate metabolic pathways involving sulfur-containing amino acids.
• Fine Chemical Synthesis: Acts as a versatile building block for the preparation of complex organic molecules requiring a protected or modified cysteine moiety.
• Reference Standard: Supplied as a high-purity compound for use as an analytical standard in quality control and method development within analytical laboratories.

Basic Information

Product Name	L-Cysteine, 2-Methyl- (9Ci)
CAS No.	441317-73-3
Molecular Formula	C4H9NO2S
Molecular Weight	135.18 g/mol
Synonyms	(2R)-2-Amino-2-methyl-3-sulfanylpropanoic acid; 2-Methyl-L-cysteine; (R)-2-Amino-2-methyl-3-mercaptopropanoic acid; 2-Methylcysteine; L-2-Methylcysteine; 3-Mercapto-2-aminoisobutyric acid
EINECS	Contact for details

Quality Control

Our L-Cysteine, 2-Methyl- (9Ci) is produced under strict quality management protocols. Each batch undergoes comprehensive analytical testing, including chiral purity verification and impurity profiling, to ensure it meets the exacting standards required for research and development applications. A detailed Certificate of Analysis (COA) is provided with every shipment, documenting identity, purity (typically ≥95% by HPLC), and other critical parameters.

Storage

Preserve in a tightly closed container, protected from light. Due to its hygroscopic (moisture-sensitive) nature and tendency to be easily oxidized, it is recommended to store the material under an inert atmosphere (e.g., nitrogen or argon) at a controlled room temperature (15-25°C). For long-term stability, storage at 2-8°C is advised.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Chiral Purity (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Residue on Ignition	≤ 0.5%

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