Description

2,5-Dichlorothiophene (CAS 3172-52-9) is a high-purity halogenated thiophene derivative with the molecular formula C₄H₂Cl₂S. This heterocyclic organic compound features a thiophene ring substituted with chlorine atoms at the 2 and 5 positions, making it a valuable intermediate in synthetic organic chemistry and materials science. Available in liquid form with typical purity grades of ≥98%, this compound is characterized by its clear to pale yellow appearance and distinct aromatic odor. It is widely utilized in pharmaceutical research, agrochemical synthesis, and as a building block for conductive polymers and organic semiconductors. Proper storage under inert atmosphere at 2-8°C is recommended to maintain stability. This product is intended for research and industrial use only – not for drug or household applications.

Properties

• CAS Number: 3172-52-9
• Complexity: 58.7
• IUPAC Name: 2,5-dichlorothiophene
• InChI: InChI=1S/C4H2Cl2S/c5-3-1-2-4(6)7-3/h1-2H
• InChI Key: FGYBDASKYMSNCX-UHFFFAOYSA-N
• Exact Mass: 151.9254266
• Molecular Formula: C4H2Cl2S
• Molecular Weight: 153.03
• SMILES: C1=C(SC(=C1)Cl)Cl
• Topological: 28.2
• Monoisotopic Mass: 151.9254266
• Physical Description: Clear liquid with a stench; Darkens on storage;
• Synonyms: 2,5-DICHLOROTHIOPHENE, 3172-52-9, Thiophene, 2,5-dichloro-, 2,-Dichlorothiophene, EINECS 221-638-8, NSC 60527, DTXSID6062888, Thiophene, 2,5dichloro, DTXCID0038411, 221-638-8, 173777-89-4, 2,5-dichloro-thiophene, MFCD00005423, NSC-60527, Thiophene, 2,5-dichloro-, radical ion(1-) (9CI), 2,5-dichloro thiophene, NSC60527, Thiophene,5-dichloro-, 7Z74FM5ZZL, BIDD:GT0088, SCHEMBL192505, SCHEMBL658939, 2,5-Dichlorothiophene, 98%, AKOS000120064, AC-4915, CS-W010944, LS-12972, DB-000813, D0250, NS00029168, ST50824382, EN300-19929, D78168, Thiophene,2,5-dichloro-,radical ion(1-)(9ci), InChI=1/C4H2Cl2S/c5-3-1-2-4(6)7-3/h1-2

Application

2,5-Dichlorothiophene serves as a key precursor in the synthesis of polythiophene-based conductive polymers for electronic applications. Researchers employ this compound as a building block for pharmaceutical intermediates, particularly in the development of antimicrobial and antifungal agents. The material finds additional use in organic light-emitting diodes (OLEDs) and as a starting material for various organometallic catalysts in cross-coupling reactions.

Safety and Hazards

GHS Hazard Statements

• H226 (100%): Flammable liquid and vapor [Warning Flammable liquids]
• H300 (13.3%): Fatal if swallowed [Danger Acute toxicity, oral]
• H341 (11.1%): Suspected of causing genetic defects [Warning Germ cell mutagenicity]

Precautionary Statements

• P203, P210, P233, P240, P241, P242, P243, P264, P270, P280, P301+P316, P303+P361+P353, P318, P321, P330, P370+P378, P403+P235, P405, and P501

Hazard Classes and Categories

• Flam. Liq. 3 (100%)
• Acute Tox. 2 (13.3%)
• Muta. 2 (11.1%)

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Disclaimer: Sold exclusively for laboratory research. Prohibited for commercial use, diagnostics, or human/animal applications. Buyers assume all compliance liability.