Description

Methyl L-2-Isothiocyanato-4-(Methylthio)Butyrate CAS NO 21055-47-0 is a specialized chiral building block and synthetic intermediate containing both isothiocyanate and thioether functional groups. This compound is valued for its role in the synthesis of complex molecules, particularly in pharmaceutical research and agrochemical development. It is primarily sought by R&D chemists and process development scientists in the fine chemical, pharmaceutical, and crop protection industries for constructing novel active ingredients and advanced materials.

Application

• Pharmaceutical Intermediate: Key chiral synthon for the development of novel drug candidates, particularly in oncology and metabolic disease research.
• Agrochemical Synthesis: Building block for creating advanced pesticides and herbicides with specific modes of action.
• Peptide Mimetics & Conjugation: The reactive isothiocyanate group enables site-specific conjugation and the creation of peptide-like structures for biochemical studies.
• Ligand & Catalyst Development: Used in the preparation of specialized ligands for asymmetric catalysis and metal complexation.
• Chemical Biology Probes: Serves as a precursor for labeling reagents and activity-based probes used in proteomics and cellular imaging.
• Material Science Research: Intermediate in the synthesis of functional polymers and advanced organic materials with tailored properties.

Basic Information

Product Name	Methyl L-2-Isothiocyanato-4-(Methylthio)Butyrate
CAS No.	21055-47-0
Molecular Formula	C7H11NO2S2
Molecular Weight	205.30 g/mol
Synonyms	L-Methionine isothiocyanate methyl ester; Methyl (2S)-2-isothiocyanato-4-(methylsulfanyl)butanoate; (S)-Methyl 2-isothiocyanato-4-(methylthio)butyrate; NSC 334365; Methyl L-methionyl isothiocyanate; L-Methionine NCS methyl ester; 2-Isothiocyanato-4-(methylthio)butyric acid methyl ester, L-
EINECS	Contact for details

Quality Control

Our production of Methyl L-2-Isothiocyanato-4-(Methylthio)Butyrate adheres to strict quality management protocols. Each batch undergoes comprehensive analytical testing, including chiral purity verification by HPLC, to ensure consistency and meet the exacting standards required for research and development. A Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed under an inert atmosphere after opening to prevent degradation. Keep away from heat and incompatible materials.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Chiral Purity (HPLC)	≥ 99.0% ee
Water Content (KF)	≤ 0.5%
Residue on Ignition	≤ 0.1%

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