Description

D-Methionine, Methyl Ester, Conjugate Monoacid (9Ci) is a specialized chiral amino acid derivative, serving as a crucial building block and intermediate in advanced organic synthesis. Its defined stereochemistry and functionalized ester group make it a valuable precursor for the development of pharmaceuticals, bioactive peptides, and complex fine chemicals. This high-purity intermediate is essential for research and production in pharmaceutical development, agrochemical synthesis, and advanced material science, where precise molecular structure is critical for efficacy and performance.

Application

• Pharmaceutical Intermediate: Key chiral building block for the synthesis of novel active pharmaceutical ingredients (APIs), particularly in metabolic and neurological drug candidates.
• Peptide Synthesis: Used in solid-phase and solution-phase peptide synthesis to incorporate modified methionine residues with specific properties.
• Agrochemical Research: Intermediate in the development of advanced herbicides, fungicides, and plant growth regulators with targeted activity.
• Biochemical Research: Tool compound for studying enzyme mechanisms, metabolic pathways, and protein structure-function relationships.
• Fine Chemical Production: Precursor for manufacturing specialty chemicals, flavors, fragrances, and advanced polymeric materials.
• Diagnostic Reagent Development: Component in the formulation of specialized reagents and assays for clinical and research diagnostics.

Basic Information

Product Name	D-Methionine, Methyl Ester, Conjugate Monoacid (9Ci)
CAS No.	181878-06-8
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	D-Methionine methyl ester conjugate monoacid; (R)-2-Amino-4-(methylthio)butanoic acid methyl ester conjugate; Methyl D-methioninate conjugate; D-Met-OMe conjugate monoacid; (9CI) designation intermediate; D-Methionine derivative ester; Chiral methionine ester intermediate; Amino acid ester conjugate
EINECS	Contact for details

Quality Control

Our D-Methionine, Methyl Ester, Conjugate Monoacid (9Ci) is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including chiral purity verification by HPLC, identity confirmation by IR and NMR spectroscopy, and stringent control of related substances. Certificates of Analysis (COA) documenting all critical parameters are provided to ensure traceability and compliance with your research or cGMP starting material requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place. Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent degradation. Recommended long-term storage temperature is 2-8°C.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Identification (NMR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Chiral Purity (HPLC)	≥ 99.0% ee
Related Substances (HPLC)	Total impurities ≤ 2.0%
Water Content (KF)	≤ 1.0%
Residue on Ignition	≤ 0.1%

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