Description

1,1-Bis(Methylthio)Ethylene is a versatile sulfur-containing organic building block characterized by its unique geminal dithioacetal structure. This compound is valued for its role as a key intermediate in the synthesis of complex heterocycles and functionalized molecules, particularly in pharmaceutical and agrochemical research. It is essential for chemists and manufacturers in fine chemical, pharmaceutical, and advanced material sectors seeking to introduce specific sulfur functionalities or create protected carbonyl equivalents.

Application

• Pharmaceutical Intermediate: A crucial precursor in the synthesis of active pharmaceutical ingredients (APIs), especially those containing thioether or heterocyclic moieties.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and insecticides where its sulfur atoms contribute to biological activity.
• Organic Synthesis Building Block: Serves as a protected form of acetaldehyde or a synthon for introducing the -CH=C(SMe)₂ group in complex molecule construction.
• Material Science Research: Employed in the development of novel organic semiconductors and polymers with specific electronic properties.
• Flavor & Fragrance Industry: Acts as an intermediate for creating sulfur-containing compounds that contribute to savory or roasted flavor notes.
• Cross-coupling Reactions: Utilized in palladium-catalyzed reactions to form carbon-carbon bonds in advanced synthetic pathways.

Basic Information

Product Name	1,1-Bis(Methylthio)Ethylene
CAS No.	51102-74-0
Molecular Formula	C₄H₈S₂
Molecular Weight	120.23 g/mol
Synonyms	1,1-Bis(methylthio)ethene; 1,1-Ethylenebis(methyl sulfide); Ethene, 1,1-bis(methylthio)-; 1,1-Di(methylthio)ethylene; (Methylthio)acetaldehyde dimethyl dithioacetal; 2,2-Bis(methylthio)ethene; NSC 163045
EINECS	256-980-5

Quality Control

Our 1,1-Bis(Methylthio)Ethylene is produced under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including chromatography and spectroscopy, to confirm identity and purity. A Certificate of Analysis (COA) detailing specific results is provided with every shipment. We adhere to cGMP principles where applicable to support our clients in regulated industries.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as strong acids and oxidizing agents. Recommended storage temperature is between 2°C and 25°C. Keep container tightly sealed when not in use to prevent moisture absorption and maintain product integrity.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Water Content (KF)	≤ 0.5%
Refractive Index (n20/D)	1.550 - 1.560
Density (20°C)	1.05 - 1.15 g/mL

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