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3-Methyl-1-butyne, 96%

Product Code. 15470248
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Product Code. 15470248 Supplier Thermo Scientific Alfa Aesar Supplier No. H53439.14
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Estimated Shipment: 08-10-2026
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Description

CAS: 598-23-2 | C5H8 | 68.119 g/mol

3-Methyl-1-butyne is a terminal alkyne that under goes hydrosilylation reaction using phenylsilane. 3-Methyl-1-butyne is used as an intermediate for pharmaceuticals, in cosmetics and in chemical research.

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Applications
3-Methyl-1-butyne is a terminal alkyne that under goes hydrosilylation reaction using phenylsilane. 3-Methyl-1-butyne is used as an intermediate for pharmaceuticals, in cosmetics and in chemical research.

Solubility
Miscible with alcohol. Immiscible with water.

Notes
Store in cool place. Light and heat sensitive. Incompatible with strong oxidizing agents, acids and bases.
TRUSTED_SUSTAINABILITY

Chemical Identifiers

CAS 598-23-2
Molecular Formula C5H8
Molecular Weight (g/mol) 68.119
MDL Number MFCD00039853
InChI Key USCSRAJGJYMJFZ-UHFFFAOYSA-N
Synonym 3-methyl-1-butyne, 1-butyne, 3-methyl, isopentyne, isopropylacetylene, isopropyl acetylene, 3-methylbutyne, 2-methyl-3-butyne, 3-methyl-but-1-yne, 3-methyl,1-butyne
PubChem CID 69019
ChEBI CHEBI:87379
IUPAC Name 3-methylbut-1-yne
SMILES CC(C)C#C

Specifications

Density 0.666
Boiling Point 30°C
Flash Point −30°C (−22°F)
Linear Formula (CH3)2CHC≡CH
Refractive Index 1.374
Quantity 25 g
UN Number UN3295
Solubility Information Miscible with alcohol. Immiscible with water.
Formula Weight 68.12
Percent Purity 97%
Chemical Name or Material 3-Methyl-1-butyne
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RUO – Research Use Only

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