Thieno[3,2-b]thiophene-2,5-dicarboxylic acid - ≥95% , CAS No.18646-81-6

CAS: 18646-81-6 Cat. No.: T770328 Molecular Weight: 228.25 EC Number: 832-455-3
AVAILABLE TO ORDER
GRADE & PURITY ≥95%
Synonyms
Thieno[3,2-b]thiophene-2,4-dicarboxylic acid
Storage
Store at 2-8°C,Protected from light,Argon charged,Desiccated
Shipped In
Wet ice
 ·  off list, applied to all prices below.
Size
Status
Price
Qty
50mg
T770328-50mg
8-12 wks(?) Production requires sourcing of materials. We appreciate your patience and understanding.
$65.90
250mg
T770328-250mg
8-12 wks(?) Production requires sourcing of materials. We appreciate your patience and understanding.
$185.90
1g
T770328-1g
8-12 wks(?) Production requires sourcing of materials. We appreciate your patience and understanding.
$484.90
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Why this grade

≥95% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

🌡

Storage & shipping

Store at 2-8°C,Protected from light,Argon charged,Desiccated Ships Wet ice Check lot-specific COA for exact specifications.

📋

Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

📚

Literature proof

Cited in 0 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Specifications

Synonyms
Thieno[3, 2-b]thiophene-2, 4-dicarboxylic acid
Specifications & Purity
≥95%
Storage
Store at 2-8°C, Protected from light, Argon charged, Desiccated
Shipped In
Wet ice
This product requires cold chain shipping. Ground and other economy services are not available.
Purity
≥95%
Names and Identifiers
Canonical SmilesC1=C(SC2=C1SC(=C2)C(=O)O)C(=O)O
IUPAC Namethieno[3,2-b]thiophene-2,5-dicarboxylic acid
InChIKeyJMURVZFFOUWCNW-UHFFFAOYSA-N
INCHI1S/C8H4O4S2/c9-7(10)5-1-3-4(14-5)2-6(13-3)8(11)12/h1-2H,(H,9,10)(H,11,12)
Isomeric SMILES C1=C(SC2=C1SC(=C2)C(=O)O)C(=O)O
Molecular Weight 228.25

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

Download SDS →

✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

Look up COA →

📊 Datasheet

Quick-reference summary of product specifications and applications.

View datasheet →

🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

View spec sheet →

Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomOrganic compounds
SuperclassOrganoheterocyclic compounds
ClassThienothiophenes
SubclassNot available
Intermediate Tree Nodes Not available
Direct ParentThienothiophenes
Alternative Parents Thiophene carboxylic acids  2,3,5-trisubstituted thiophenes  Dicarboxylic acids and derivatives  Heteroaromatic compounds  Carboxylic acids  Organooxygen compounds  Organic oxides  Hydrocarbon derivatives  
Molecular FrameworkAromatic heteropolycyclic compounds
Substituents Thienothiophene - 2,3,5-trisubstituted thiophene - Thiophene carboxylic acid or derivatives - Thiophene carboxylic acid - Dicarboxylic acid or derivatives - Heteroaromatic compound - Thiophene - Carboxylic acid - Carboxylic acid derivative - Organic oxygen compound - Organic oxide - Hydrocarbon derivative - Organooxygen compound - Aromatic heteropolycyclic compound
DescriptionThis compound belongs to the class of organic compounds known as thienothiophenes. These are organic compounds containing two thiophene rings fused to each other.
External Descriptors Not available
3D Structure
Interactive Chemical Structure Model





Certificates(CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

4 results found

Lot NumberCertificate TypeDateItem
F2602410Certificate of AnalysisMay 18, 2026 T770328
F2602412Certificate of AnalysisMay 18, 2026 T770328
F2602413Certificate of AnalysisMay 18, 2026 T770328
F2602415Certificate of AnalysisMay 18, 2026 T770328
Chemical and Physical Properties
Sensitivitylight sensitive;air sensitive
Boil Point(°C)544.1±45.0 °C at 760 mmHg
Melt Point(°C)340-350 °C
Molecular Weight228.200 g/mol
XLogP32.400
Hydrogen Bond Donor Count2
Hydrogen Bond Acceptor Count6
Rotatable Bond Count2
Exact Mass227.955 Da
Monoisotopic Mass227.955 Da
Topological Polar Surface Area131.000 Ų
Heavy Atom Count14
Formal Charge0
Complexity253.000
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count1
Solution Calculators
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