Description

Cysteine, 3-Amino-, Methyl Ester (9Ci) is a specialized amino acid derivative with significant potential in advanced organic synthesis and pharmaceutical research. This compound serves as a crucial chiral building block for the development of novel peptides, enzyme inhibitors, and other bioactive molecules. It is primarily utilized by research institutions and industrial R&D departments in the pharmaceutical, agrochemical, and fine chemical sectors seeking to explore new molecular entities and synthetic pathways.

Application

• Pharmaceutical Intermediate: A key chiral synthon for the research and development of new active pharmaceutical ingredients (APIs), particularly in peptide-based drug discovery.
• Biochemical Research: Used as a precursor or substrate in enzymatic studies and for probing protein structure-function relationships.
• Peptide Synthesis: Serves as a protected or modified cysteine derivative in solid-phase and solution-phase peptide synthesis.
• Agrochemical Development: Employed in the synthesis of novel compounds with potential herbicidal or pesticidal activity.
• Fine Chemical Production: Acts as a building block for creating complex molecules with specific stereochemistry for various high-value applications.
• Ligand and Catalyst Development: Utilized in the design of chiral ligands for asymmetric catalysis and metal complexation.

Basic Information

Product Name	Cysteine, 3-Amino-, Methyl Ester (9Ci)
CAS No.	246225-89-8
Molecular Formula	C4H10N2O2S
Molecular Weight	150.20 g/mol
Synonyms	3-Aminocysteine Methyl Ester; Methyl 3-Amino-3-mercaptopropanoate; 3-Amino-L-cysteine methyl ester; 3-Amino-3-mercaptopropionic acid methyl ester; (R)-Methyl 3-amino-3-sulfanylpropanoate; 3-Aminocysteine Me ester; L-3-Aminocysteine methyl ester; 2-Amino-3-mercaptopropionic acid 3-methyl ester
EINECS	Contact for details

Quality Control

Our Cysteine, 3-Amino-, Methyl Ester (9Ci) is produced under strict quality management protocols. Each batch undergoes comprehensive analytical testing, including chiral purity and identity confirmation, to ensure it meets the high standards required for research and development applications. A Certificate of Analysis (COA) detailing specific results for purity, assay, and related substances is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed in a dry environment to prevent moisture absorption. For long-term storage, consider using desiccants or an inert atmosphere.

Specification

Item	Specification
Appearance	White to off-white powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Chiral Purity (HPLC)	≥ 98.0% ee
Water Content (KF)	≤ 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.