Description

Methyl 2-Methyl-3-Mercaptopropionate CAS NO 4131-76-4 is a sulfur-containing ester valued for its unique thiol functionality and fruity, tropical aroma profile. This compound is a versatile intermediate and flavor/fragrance ingredient, prized for its ability to impart powerful, authentic notes. It is essential for manufacturers in the flavor and fragrance industry, as well as for organic synthesis chemists developing pharmaceuticals and agrochemicals.

Application

• Flavor & Fragrance (F&F) Industry: A key building block for creating complex tropical and fruity flavor compositions, such as passionfruit, grapefruit, and guava.
• Aroma Chemical Synthesis: Serves as a crucial intermediate in the production of more sophisticated sulfur-containing aroma molecules like mercapto esters and thioethers.
• Pharmaceutical Intermediates: Used in organic synthesis for constructing molecules with thiol or sulfide functional groups for potential active pharmaceutical ingredients (APIs).
• Agrochemical Synthesis: Acts as a precursor in the manufacture of certain pesticides and herbicides where the thiol moiety is integral to biological activity.
• Research & Development: Employed in academic and industrial R&D labs as a reagent for studying thiol-ene click chemistry and other sulfur-based reactions.

Basic Information

Product Name	Methyl 2-Methyl-3-Mercaptopropionate
CAS No.	4131-76-4
Molecular Formula	C5H10O2S
Molecular Weight	134.20 g/mol
Synonyms	Methyl 3-Mercapto-2-methylpropionate; 3-Mercapto-2-methylpropionic Acid Methyl Ester; 2-Methyl-3-mercaptopropionic Acid Methyl Ester; Methyl β-Mercaptoisobutyrate; 3-Thiol-2-methylpropanoic Acid Methyl Ester; MMMP; FEMA 2722
EINECS	223-945-6

Quality Control

Our Methyl 2-Methyl-3-Mercaptopropionate is produced under strict quality management systems. Each batch is analyzed to ensure it meets stringent specifications for identity, purity, and olfactory profile. A comprehensive Certificate of Analysis (COA) detailing results for assay, specific gravity, refractive index, and chromatographic purity (GC) is provided with every shipment to guarantee consistent quality and traceability.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, well-ventilated place, preferably under an inert atmosphere (e.g., nitrogen) to minimize oxidation due to its easily oxidized nature. Keep away from heat, sparks, and open flame. Due to its high volatility, ensure containers are securely sealed when not in use.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to reference spectrum
Assay (GC)	≥ 98.0%
Specific Gravity (20°C)	1.050 - 1.090
Refractive Index (20°C)	1.460 - 1.470
Odor	Characteristic, strong tropical fruity

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