Cyclooctatetraene - ≥98% , CAS No.629-20-9

CAS: 629-20-9 Cat. No.: C281422 Formula: C8H8 Molecular Weight: 104.15 EC Number: 211-080-3
AVAILABLE TO ORDER
GRADE & PURITY ≥98%
Synonyms
CYCLOOCTATETRAENE [MI] | 1,5,7-Cyclooctatetraene | AJ19R479CQ | Cyclooctatetraene | NSC5093 | NSC-5093 | Cyclooctatetraene [UN2358] [Flammable liquid] | UN 2358 | (1Z,3Z,5Z,7Z)-cycloocta-1,3,5,7-tetraene | NSC 5093 | AKOS025311186 | AKOS015840921 | BBL02
Storage
Store at -20°C
Shipped In
Ice chest + Ice pads,FedEx DG Service
★
Size
Germany (EU)
USA*
Price
Qty
1g
C281422-1g
—
3 In stock
€109.25
Enter a quantity for the sizes you want to add.
🧪
Why this grade

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

🌡

Storage & shipping

Store at -20°C Ships Ice chest + Ice pads,FedEx DG Service 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 1 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Specifications

Synonyms
CYCLOOCTATETRAENE [MI] | 1,5,7-Cyclooctatetraene | AJ19R479CQ | Cyclooctatetraene | NSC5093 | NSC-5093 | Cyclooctatetraene [UN2358] [Flammable liquid] | UN 2358 | (1Z,3Z,5Z,7Z)-cycloocta-1,3,5,7-tetraene | NSC 5093 | AKOS025311186 | AKOS015840921 | BBL02
Specifications & Purity
≥98%
Storage
Store at -20°C
Shipped In
Ice chest + Ice pads,FedEx DG Service
This product requires cold chain shipping. Ground and other economy services are not available.
Purity
≥98%
Names and Identifiers
Pubchem Sid
Pubchem Sid Url
https://pubchem.ncbi.nlm.nih.gov/substance/488190862
Canonical Smiles
C1=CC=CC=CC=C1
IUPAC Name
cyclooctatetraene
InChIKey
KDUIUFJBNGTBMD-DLMDZQPMSA-N
INCHI
1S/C8H8/c1-2-4-6-8-7-5-3-1/h1-8H/b2-1-,3-1?,4-2?,5-3-,6-4-,7-5?,8-6?,8-7-
Isomeric SMILES
C\1=C\C=C/C=C\C=C1
UN Number
2358
Packing Group
II
Molecular Weight
104.15
Reaxy-Rn
2496800
Reaxys-RN_link_address
https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=2496800&ln=

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
SuperclassHydrocarbons
ClassUnsaturated hydrocarbons
SubclassOlefins
Intermediate Tree Nodes Cyclic olefins
Direct ParentCycloalkenes
Alternative Parents Unsaturated aliphatic hydrocarbons  
Molecular FrameworkAliphatic homomonocyclic compounds
Substituents Cycloalkene - Unsaturated aliphatic hydrocarbon - Aliphatic homomonocyclic compound
DescriptionThis compound belongs to the class of organic compounds known as cycloalkenes. These are unsaturated monocyclic hydrocarbons having one endocyclic double bond.
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.

5 results found

Lot NumberCertificate TypeDateItem
E23181059Certificate of AnalysisMar 10, 2026 C281422
I2617417Certificate of AnalysisMar 20, 2025 C281422
A2429285Certificate of AnalysisJan 13, 2024 C281422
A2429286Certificate of AnalysisJan 13, 2024 C281422
E23181041Certificate of AnalysisApr 11, 2023 C281422
Chemical and Physical Properties
SolubilityVery soluble in Ethanol,Ether,Benzene
Sensitivityair sensitive;Light sensitive ;hot sensitive
x_refractive_index1.54
x_boil_point_char142-143℃
x_melt_point_char-5℃
Molecular Weight104.150 g/mol
XLogP33.100
Hydrogen Bond Donor Count0
Hydrogen Bond Acceptor Count0
Rotatable Bond Count0
Exact Mass104.063 Da
Monoisotopic Mass104.063 Da
Topological Polar Surface Area0.000 Ų
Heavy Atom Count8
Formal Charge0
Complexity86.400
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count4
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds4
Covalently-Bonded Unit Count1
Citations of This Product
Solution Calculators
Reviews

Customer Reviews

Frequently Asked Questions

What is the purity of this product?
This product is supplied at ≥98% purity (chemical assay). Lot-specific values are stated on the Certificate of Analysis.
How should this product be stored?
Store at ?20 °C. Freezer storage is required to maintain the specified shelf life.
How is this product shipped?
This product ships in an insulated container with ice pads. Unpack on arrival and transfer it to the storage condition stated above.
What are the CAS number, molecular formula and molecular weight?
The CAS Number is 629-20-9, the molecular formula is C8H8, and the molecular weight is 104.15 g/mol. InChIKey KDUIUFJBNGTBMD-DLMDZQPMSA-N.
What documentation is provided?
Available product documentation, including Certificates of Analysis (COA), Safety Data Sheets (SDS), and specification sheets, is shown in the product document area. Document availability and access follow the current site policy.

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