t-Butylmethylacetylene - ≥98% , CAS No.999-78-0

CAS: 999-78-0 Cat. No.: T281421 Molecular Weight: 96.17 EC Number: 633-707-3 PubChem CID: 136786
AVAILABLE TO ORDER
GRADE & PURITY ≥98%
Synonyms
MFCD00041613 | 2-Pentyne, 4,4-dimethyl- | AKOS006228572 | DTXSID40244289 | FT-0617083 | tert-Butyl methyl acetylene | InChI=1/C7H12/c1-5-6-7(2,3)4/h1-4H | 4,4-Dimethyl-2-pentyne | 2,2-dimethyl-3-pentyne | 4,4-dimethyl-pent-2-yne | 4,4-dimethylpent-2-yne |
Storage
Store at 2-8°C
Shipped In
Wet ice
 ·  off list, applied to all prices below.
Size
Status
Price
Qty
250mg
T281421-250mg
8-12 wks(?) Production requires sourcing of materials. We appreciate your patience and understanding.
$53.90
1g
T281421-1g
8-12 wks(?) Production requires sourcing of materials. We appreciate your patience and understanding.
$139.90
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Why this grade

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

🌡

Storage & shipping

Store at 2-8°C 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.

Overview

Product Application:

4,4-Dimethyl-2-pentyne is used in organometallic reactions for regioselectivity of its insertion into the Pd-C bond of cyclopalladated complexes. It is also used to prepare pyrimidine-dione by reacting with isocyanate in the presence of nickel/ N-heterocyclic carbene.

Specifications

Synonyms
MFCD00041613 | 2-Pentyne, 4, 4-dimethyl- | AKOS006228572 | DTXSID40244289 | FT-0617083 | tert-Butyl methyl acetylene | InChI=1/C7H12/c1-5-6-7(2, 3)4/h1-4H | 4, 4-Dimethyl-2-pentyne | 2, 2-dimethyl-3-pentyne | 4, 4-dimethyl-pent-2-yne | 4, 4-dimethylpent-2-yne |
Specifications & Purity
≥98%
Storage
Store at 2-8°C
Shipped In
Wet ice
This product requires cold chain shipping. Ground and other economy services are not available.
Purity
≥98%
Names and Identifiers
Canonical SmilesCC#CC(C)(C)C
IUPAC Name4,4-dimethylpent-2-yne
InChIKeyFOALCTWKQSWRST-UHFFFAOYSA-N
INCHI1S/C7H12/c1-5-6-7(2,3)4/h1-4H3
Isomeric SMILES CC#CC(C)(C)C
PubChem CID 136786
Molecular Weight 96.17

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
SubclassAcetylenes
Intermediate Tree Nodes Acyclic acetylenes - Alkynes
Direct ParentTerminal alkynes
Alternative Parents Unsaturated aliphatic hydrocarbons  
Molecular FrameworkAliphatic acyclic compounds
Substituents Monosubstituted alkyne - Unsaturated aliphatic hydrocarbon - Aliphatic acyclic compound
DescriptionThis compound belongs to the class of organic compounds known as terminal alkynes. These are alkynes featuring a carbon substituent on one acetylenic carbon, and a hydrogen on the other carbon.
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.

2 results found

Lot NumberCertificate TypeDateItem
K2519525Certificate of AnalysisSep 25, 2025 T281421
K2519528Certificate of AnalysisSep 25, 2025 T281421
Chemical and Physical Properties
SolubilityImmiscible with water.
SensitivityHygroscopic
Refractive Index1.4085
Flash Point(°C)14°F
Boil Point(°C)83°C
Molecular Weight96.170 g/mol
XLogP32.700
Hydrogen Bond Donor Count0
Hydrogen Bond Acceptor Count0
Rotatable Bond Count1
Exact Mass96.0939 Da
Monoisotopic Mass96.0939 Da
Topological Polar Surface Area0.000 Ų
Heavy Atom Count7
Formal Charge0
Complexity101.000
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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