Thieno[3,2-b]thiophene - ≥98% , CAS No.251-41-2

CAS: 251-41-2 Cat. No.: T119992 Molecular Weight: 140.23 Beilstein Registry Number: 19(5)1,429 EC Number: 626-295-1 PubChem CID: 136063
AVAILABLE TO ORDER
GRADE & PURITY ≥98%
Synonyms
1,4-Dithiapentalene | C6H4S2 | YSWG277 | thienothiophene | SCHEMBL29149 | (3aS-cis)-1,2,3,3a,8,8a-Hexahydro-1,3a,8-trimethylpyrrolo(2,3-b)indol-5-ol methylcarbamate (ester) | HY-34607 | Kyselina amidosulfonova [Czech] | J1Z | FT-0649134 | 1,4-Thiophthene
Storage
Room temperature,Argon charged
Shipped In
Normal
 ·  off list, applied to all prices below.
Size
Status
Price
Qty
1g
T119992-1g
10

$10.90

$16.90
Save $6.00 (35.50%)
5g
T119992-5g
4
$49.90
10g
T119992-10g
5
$89.90
25g
T119992-25g
2
$199.90
100g
T119992-100g
1
$639.90
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Why this grade

≥98% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

🌡

Storage & shipping

Room temperature,Argon charged Ships Normal 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 6 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Specifications

Synonyms
1, 4-Dithiapentalene | C6H4S2 | YSWG277 | thienothiophene | SCHEMBL29149 | (3aS-cis)-1, 2, 3, 3a, 8, 8a-Hexahydro-1, 3a, 8-trimethylpyrrolo(2, 3-b)indol-5-ol methylcarbamate (ester) | HY-34607 | Kyselina amidosulfonova [Czech] | J1Z | FT-0649134 | 1, 4-Thiophthene
Specifications & Purity
≥98%
Storage
Room temperature, Argon charged
Shipped In
Normal
Purity
≥98%
Names and Identifiers
Pubchem Sid488187841
Pubchem Sid Urlhttps://pubchem.ncbi.nlm.nih.gov/substance/488187841
Canonical SmilesC1=CSC2=C1SC=C2
IUPAC Namethieno[3,2-b]thiophene
InChIKeyVJYJJHQEVLEOFL-UHFFFAOYSA-N
INCHI1S/C6H4S2/c1-3-7-6-2-4-8-5(1)6/h1-4H
Isomeric SMILES C1=CSC2=C1SC=C2
WGK Germany 3
PubChem CID 136063
Molecular Weight 140.23
Beilstein 19(5)1,429
Reaxy-Rn 110009

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 Thiophenes  Heteroaromatic compounds  Hydrocarbon derivatives  
Molecular FrameworkAromatic heteropolycyclic compounds
Substituents Thienothiophene - Heteroaromatic compound - Thiophene - Hydrocarbon derivative - 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.

20 results found

Lot NumberCertificate TypeDateItem
E2628575Certificate of AnalysisMay 15, 2026 T119992
E2628574Certificate of AnalysisMay 15, 2026 T119992
E2628573Certificate of AnalysisMay 15, 2026 T119992
E2628572Certificate of AnalysisMay 15, 2026 T119992
H2119345Certificate of AnalysisJun 09, 2025 T119992
H2119344Certificate of AnalysisJun 09, 2025 T119992
I2008210Certificate of AnalysisJul 16, 2024 T119992
G23051305Certificate of AnalysisMay 29, 2023 T119992
G23051307Certificate of AnalysisMay 29, 2023 T119992
G23051308Certificate of AnalysisMay 29, 2023 T119992
G23051312Certificate of AnalysisMay 29, 2023 T119992
E23261141Certificate of AnalysisMay 11, 2023 T119992
E23261145Certificate of AnalysisMay 11, 2023 T119992
E23261140Certificate of AnalysisMay 11, 2023 T119992
E23261138Certificate of AnalysisMay 11, 2023 T119992
E23261137Certificate of AnalysisMay 11, 2023 T119992
E23261136Certificate of AnalysisMay 11, 2023 T119992
E23261093Certificate of AnalysisMay 11, 2023 T119992
E23161134Certificate of AnalysisMay 11, 2023 T119992
D23061291Certificate of AnalysisAug 21, 2021 T119992

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Chemical and Physical Properties
SolubilitySoluble in Methanol
Sensitivityair sensitive
Boil Point(°C)71°C
Melt Point(°C)56°C
Molecular Weight140.200 g/mol
XLogP32.700
Hydrogen Bond Donor Count0
Hydrogen Bond Acceptor Count2
Rotatable Bond Count0
Exact Mass139.975 Da
Monoisotopic Mass139.975 Da
Topological Polar Surface Area56.500 Ų
Heavy Atom Count8
Formal Charge0
Complexity80.500
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
Documents & Articles
Citations of This Product
References
1. Tong Zhou, Xue Xia, Heping Cui, Khizar Hayat, Xiaoming Zhang, Chi-Tang Ho.  (2023)  Promotion or Inhibition Effects of Exogenous Glutathione-Degraded Amino Acids on the Formation of 2,3-Butanedione and Pyrazines via Varied Pathways of Interaction with α-Dicarbonyl Compounds Derived from N-(1-Deoxy-d-xylulos-1-yl)-alanine.  JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY,      [PMID:37737140] [10.1021/acs.jafc.3c04424]
2. Tong Zhou, Xue Xia, Heping Cui, Yun Zhai, Foxin Zhang, Khizar Hayat, Xiaoming Zhang, Chi-Tang Ho.  (2023)  Cysteine-Induced pH-Dependent Formation of Thiols and Sulfides or 2-Acetylthiazole and Pyrazines during Thermal Treatment of N-(1-Deoxy-d-xylulos-1-yl)-alanine.  JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY,      [PMID:36696632] [10.1021/acs.jafc.2c08360]
3. Fangli Yi, Qing Yang, Xinyu Li, Yiqi Yuan, Hongmei Cao, Kewei Liu, Hongjian Yan.  (2022)  A 1,3,5-triazine and benzodithiophene based donor-acceptor type semiconducting conjugated polymer for photocatalytic overall water splitting.  JOURNAL OF SOLID STATE CHEMISTRY,      [PMID:] [10.1016/j.jssc.2022.123769]
4. Tong Zhou, Xue Xia, Heping Cui, Khizar Hayat, Xiaoming Zhang, Chi-Tang Ho.  (2022)  Competitive Formation of 2,3-Butanedione and Pyrazines through Intervention of Added Cysteine during Thermal Processing of Alanine-Xylose Amadori Compounds.  JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY,      [PMID:36444759] [10.1021/acs.jafc.2c07026]
5. Shengbo Zhu, Zhongwei An, Xinbing Chen, Pei Chen, Qianfeng Liu.  (2015)  Cyclic thiourea functionalized dyes with binary π-linkers: Influence of different π-conjugation segments on the performance of dye-sensitized solar cells.  DYES AND PIGMENTS,      [PMID:] [10.1016/j.dyepig.2015.01.022]
6. Shanxin Xiong, Huanyu Tan, Jiaxue Hou, Shengyu Wang, Yukun Zhang, Xicheng Lu, Chunxia Hua, Jia Chu, Ming Gong.  (2025)  Infrared Electrochromic Properties Regulation of Poly(thieno[3,2-b]thiophene) Porous Films Prepared by Electrodeposition.  ACS Applied Polymer Materials,      [PMID:] [10.1021/acsapm.5c03354]
Solution Calculators
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