Description

3-Methylthiolane is a sulfur-containing heterocyclic compound, specifically a tetrahydrothiophene derivative, with the CAS registry number 4740-00-5. This organosulfur building block is valued for its unique chemical structure, which makes it a versatile intermediate in the synthesis of more complex molecules. It is primarily sought after by research and development chemists and process engineers in the pharmaceutical, agrochemical, and specialty chemical industries for creating novel compounds and materials.

Application

• Pharmaceutical Intermediate: Serves as a key synthon in the development of new active pharmaceutical ingredients (APIs), particularly those requiring sulfur-containing heterocyclic scaffolds.
• Agrochemical Synthesis: Used in the research and production of advanced pesticides, herbicides, and fungicides where the thiolane ring can contribute to biological activity.
• Flavor & Fragrance Industry: Acts as a precursor for synthesizing sulfur-containing aroma compounds that contribute to savory, roasted, or meaty notes in flavors and fragrances.
• Material Science Research: Investigated as a monomer or building block for novel polymers and functional materials with specific electronic or chemical properties.
• Organic Synthesis Reagent: Employed in academic and industrial R&D laboratories as a versatile reagent for cyclization reactions and the introduction of sulfur functionalities.
• Ligand Synthesis: Utilized in the preparation of specialized ligands for catalysis, particularly in metal-complex chemistry.

Basic Information

Product Name	3-Methylthiolane
CAS No.	4740-00-5
Molecular Formula	C5H10S
Molecular Weight	102.20 g/mol
Synonyms	3-Methyltetrahydrothiophene; Tetrahydro-3-methylthiophene; 3-Methylthiolane; 3-Methyl-thiolane; 3-Methyl-tetrahydro-thiophene; 3-Methylthioacyclopentane
EINECS	225-246-8

Quality Control

Our 3-Methylthiolane is produced under strict quality management protocols. Every batch undergoes comprehensive analytical testing, including chromatography and spectroscopy, to ensure identity, purity, and consistency. We provide a detailed Certificate of Analysis (COA) with each shipment, documenting critical specifications. Our quality systems are designed to support cGMP and ISO standards for reliable supply to regulated industries.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from heat sources and incompatible materials. Recommended storage temperature is 2-8°C for extended stability. Keep container tightly sealed when not in use to prevent moisture absorption and oxidation.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 97.0%
Water Content (KF)	≤ 0.5%
Refractive Index (n20D)	1.480 - 1.490
Density (g/mL, 20°C)	0.950 - 0.970

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