Tetramethyl-1,3-cyclobutanedione [Precursor to Dimethyl Ketene] - ≥99% , CAS No.933-52-8

CAS: 933-52-8 Cat. No.: T161562 Molecular Weight: 140.18 EC Number: 213-269-6 PubChem CID: 13617
AVAILABLE TO ORDER
GRADE & PURITY ≥99%
Synonyms
1,3-Cyclobutanedione, 2,2,4,4-tetramethyl- | Dimethyl Ketene Dimer | Tetramethylcyclobutane-1,3-dione | 2,2,4,4-tetramethylcyclobutane-1,3-dione | 2,2,4,4-TETRAMETHYL-1,3-CYCLOBUTANEDIONE | Tetramethyl-1,3-cyclobutanedione | Tetramethylcyclobuta-1,3-dione
Storage
Room temperature,Cool
Shipped In
Normal
 ·  off list, applied to all prices below.
Size
Status
Price
Qty
1g
T161562-1g
3
$9.90
5g
T161562-5g
5
$10.90
10g
T161562-10g
6
$11.90
25g
T161562-25g
9

$22.90

$34.90
Save $12.00 (34.38%)
50g
T161562-50g
5

$41.90

$62.90
Save $21.00 (33.39%)
100g
T161562-100g
5

$82.90

$112.90
Save $30.00 (26.57%)
250g
T161562-250g
2

$181.90

$249.90
Save $68.00 (27.21%)
500g
T161562-500g
1

$351.90

$449.90
Save $98.00 (21.78%)
Enter a quantity for the sizes you want to add.
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Why this grade

≥99% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

🌡

Storage & shipping

Room temperature,Cool 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 0 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Specifications

Synonyms
1, 3-Cyclobutanedione, 2, 2, 4, 4-tetramethyl- | Dimethyl Ketene Dimer | Tetramethylcyclobutane-1, 3-dione | 2, 2, 4, 4-tetramethylcyclobutane-1, 3-dione | 2, 2, 4, 4-TETRAMETHYL-1, 3-CYCLOBUTANEDIONE | Tetramethyl-1, 3-cyclobutanedione | Tetramethylcyclobuta-1, 3-dione
Specifications & Purity
≥99%
Storage
Room temperature, Cool
Shipped In
Normal
Purity
≥99%
Names and Identifiers
Pubchem Sid488181877
Pubchem Sid Urlhttps://pubchem.ncbi.nlm.nih.gov/substance/488181877
Canonical SmilesCC1(C(=O)C(C1=O)(C)C)C
IUPAC Name2,2,4,4-tetramethylcyclobutane-1,3-dione
InChIKeyRGCDVHNITQEYPO-UHFFFAOYSA-N
INCHI1S/C8H12O2/c1-7(2)5(9)8(3,4)6(7)10/h1-4H3
Isomeric SMILES CC1(C(=O)C(C1=O)(C)C)C
WGK Germany 3
RTECS GU1775000
PubChem CID 13617
Molecular Weight 140.18
Reaxy-Rn 1072094

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
SuperclassOrganic oxygen compounds
ClassOrganooxygen compounds
SubclassCarbonyl compounds
Intermediate Tree Nodes Ketones
Direct ParentCyclic ketones
Alternative Parents Organic oxides  Hydrocarbon derivatives  
Molecular FrameworkAliphatic homomonocyclic compounds
Substituents Cyclic ketone - Organic oxide - Hydrocarbon derivative - Aliphatic homomonocyclic compound
DescriptionThis compound belongs to the class of organic compounds known as cyclic ketones. These are organic compounds containing a ketone that is conjugated to a cyclic moiety.
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.

18 results found

Lot NumberCertificate TypeDateItem
A2628729Certificate of AnalysisJan 16, 2026 T161562
A2628730Certificate of AnalysisJan 16, 2026 T161562
A2628731Certificate of AnalysisJan 16, 2026 T161562
A2628732Certificate of AnalysisJan 16, 2026 T161562
A2226023Certificate of AnalysisOct 29, 2025 T161562
A2226015Certificate of AnalysisOct 29, 2025 T161562
J2411999Certificate of AnalysisSep 23, 2024 T161562
J2411998Certificate of AnalysisSep 23, 2024 T161562
J2411997Certificate of AnalysisSep 23, 2024 T161562
J24111000Certificate of AnalysisSep 23, 2024 T161562
E1917036Certificate of AnalysisMar 08, 2023 T161562
J2225706Certificate of AnalysisAug 22, 2022 T161562
J2225713Certificate of AnalysisAug 22, 2022 T161562
J2225722Certificate of AnalysisAug 22, 2022 T161562
J2225723Certificate of AnalysisAug 22, 2022 T161562
J2225705Certificate of AnalysisAug 22, 2022 T161562
J2225702Certificate of AnalysisAug 22, 2022 T161562
C2224049Certificate of AnalysisMar 25, 2022 T161562

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Chemical and Physical Properties
Solubility It is soluble in chloroform.
Boil Point(°C)120-122℃/150mm
Melt Point(°C)112-115°C
Molecular Weight140.180 g/mol
XLogP31.700
Hydrogen Bond Donor Count0
Hydrogen Bond Acceptor Count2
Rotatable Bond Count0
Exact Mass140.084 Da
Monoisotopic Mass140.084 Da
Topological Polar Surface Area34.100 Ų
Heavy Atom Count10
Formal Charge0
Complexity167.000
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
Reviews

Customer Reviews

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