Description

Thieno[3,2-b]thiophene-2-carbaldehyde (CAS No. 31486-86-9) is a high-purity heterocyclic organic compound with the molecular formula C₇H₄OS₂. This specialized aldehyde derivative of thienothiophene is a valuable building block in organic synthesis and materials science. The compound features a fused thieno[3,2-b]thiophene core with a reactive formyl group at the 2-position, making it particularly useful for conjugation and further functionalization.

Our product is rigorously tested to ensure >98% purity (HPLC) and is supplied as a crystalline solid with excellent lot-to-lot consistency. The material is carefully packaged under inert atmosphere to maintain stability and is ideal for research applications requiring precise molecular architecture. Researchers will appreciate the compound’s role as a precursor for conductive polymers, organic semiconductors, and photovoltaic materials.

Key specifications include:

• Molecular Weight: 168.23 g/mol
• IUPAC Name: thieno[3,2-b]thiophene-5-carbaldehyde
• Synonyms: Thieno[3,2-b]thiophene-2-carboxaldehyde
• Storage: Store at 2-8°C under inert atmosphere
• Hazard Codes: Xi (Irritant)

Properties

• CAS Number: 31486-86-9
• Complexity: 149
• IUPAC Name: thieno[3,2-b]thiophene-5-carbaldehyde
• InChI: InChI=1S/C7H4OS2/c8-4-5-3-7-6(10-5)1-2-9-7/h1-4H
• InChI Key: JKVPCDAKZCFJBU-UHFFFAOYSA-N
• Exact Mass: 167.97035709
• Molecular Formula: C7H4OS2
• Molecular Weight: 168.2
• SMILES: C1=CSC2=C1SC(=C2)C=O
• Topological: 73.6
• Monoisotopic Mass: 167.97035709
• Synonyms: Thieno[3,2-b]thiophene-2-carbaldehyde, Thieno(3,2-b)thiophene-2-carbaldehyde, 805-565-4, 31486-86-9, Thieno[3,2-b]thiophene-2-carboxaldehyde, thieno[3,2-b]thiophene-5-carbaldehyde, Thieno[3,2-b!thiophene-2-carbaldehyde,97+%, C7H4OS2, MFCD01859924, Thieno[3,2,-b]thiophene-2-carbaldehyde, thienothiophene-2-carbaldehyde, SCHEMBL2591962, DTXSID50353199, SBB088199, AKOS016010176, AS-2014, CS-W017797, FT33133, SB66982, thiopheno[3,2-b]thiophene-2-carbaldehyde, DB-083418, EN300-221318, AI-942/25034329, Thieno[3,2-b]thiophene-2-carboxaldehyde, 98% (HPLC), Z1255361000

Application

Thieno[3,2-b]thiophene-2-carbaldehyde serves as a critical intermediate in the synthesis of advanced organic electronic materials. Researchers utilize this compound as a building block for developing conjugated polymers with enhanced charge transport properties for OFET and OPV applications. The aldehyde functionality enables facile condensation reactions to create novel push-pull architectures in donor-acceptor type semiconducting materials. Its rigid fused heterocyclic structure contributes to improved π-π stacking in molecular electronics.

Safety and Hazards

GHS Hazard Statements

• H302 (100%): Harmful if swallowed [Warning Acute toxicity, oral]
• H312 (66.7%): Harmful in contact with skin [Warning Acute toxicity, dermal]
• H315 (66.7%): Causes skin irritation [Warning Skin corrosion/irritation]
• H319 (66.7%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]
• H332 (66.7%): Harmful if inhaled [Warning Acute toxicity, inhalation]
• H335 (66.7%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]

Precautionary Statements

• P261, P264, P264+P265, P270, P271, P280, P301+P317, P302+P352, P304+P340, P305+P351+P338, P317, P319, P321, P330, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501

Hazard Classes and Categories

• Acute Tox. 4 (100%)
• Acute Tox. 4 (66.7%)
• Skin Irrit. 2 (66.7%)
• Eye Irrit. 2A (66.7%)
• Acute Tox. 4 (66.7%)
• STOT SE 3 (66.7%)

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