Description

Thiophene, 3,4-Dichloro-2,5-Dihydro- (9Ci) is a specialized, halogenated heterocyclic building block of significant interest in advanced organic synthesis. This compound matters for its role as a key precursor in the development of novel pharmaceuticals and agrochemicals, where its unique dihydrothiophene core with chlorine substituents offers precise reactivity for constructing complex molecular architectures. It is primarily needed by R&D chemists and process development scientists in the pharmaceutical, agrochemical, and material science industries seeking to innovate new active ingredients and functional materials.

Application

• As a versatile pharmaceutical intermediate for the synthesis of novel drug candidates, particularly in medicinal chemistry programs.
• Utilized in agrochemical research for developing new herbicides, fungicides, and insecticides with unique modes of action.
• Serves as a critical building block in organic synthesis for constructing complex heterocyclic compounds and fine chemicals.
• Potential use in material science for creating novel polymers or organic electronic materials with specific properties.
• Employed in academic and industrial R&D for methodological studies and exploring new chemical reactions.
• Acts as a precursor for the synthesis of ligands and catalysts used in asymmetric synthesis and transition metal catalysis.

Basic Information

Product Name	Thiophene, 3,4-Dichloro-2,5-Dihydro- (9Ci)
CAS No.	503544-72-7
Molecular Formula	C4H4Cl2S
Molecular Weight	155.04 g/mol
Synonyms	3,4-Dichloro-2,5-dihydrothiophene; 2,5-Dihydro-3,4-dichlorothiophene; 3,4-Dichloro-2,3-dihydrothiophene; 3,4-Dichloro-2,5-dihydrothiophene (9CI); 2,5-Dihydrothiophene, 3,4-dichloro-; 3,4-Dichloro-2,5-dihydrothiophene; 3,4-Dichloro-2,5-dihydrothiophene (9CI)
EINECS	Contact for details

Quality Control

Our Thiophene, 3,4-Dichloro-2,5-Dihydro- (9Ci) is produced under strict quality management protocols to ensure batch-to-batch consistency and high purity for research and development applications. All products undergo rigorous analytical testing, including chromatographic and spectroscopic methods. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to support your quality assurance requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (typically 15-25°C). Keep away from incompatible materials such as strong oxidizing agents. For long-term storage, consider storing under an inert atmosphere to maintain product integrity.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95.0% (Area %)
Water Content (KF)	≤ 0.5%

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