256560

1-Pentyne

99%

• Synonym(s): Propylacetylene
• Linear Formula: CH₃CH₂CH₂C≡CH
• CAS Number: 627-19-0
• Molecular Weight: 68.12
• Beilstein: 1697133
• EC Number: 210-987-1
• MDL number: MFCD00009469
• UNSPSC Code: 12352100
• PubChem Substance ID: 24855537
• NACRES: NA.22

Properties

• vapor pressure: 6.8 psi ( 20 °C)
• Quality Level: 100
• Assay: 99%
• form: liquid
• refractive index: n20/D 1.385 (lit.)
• bp: 40 °C (lit.)
• mp: −106-−105 °C (lit.)
• density: 0.691 g/mL at 25 °C (lit.)
• SMILES string: CCCC#C
• InChI: 1S/C5H8/c1-3-5-4-2/h1H,4-5H2,2H3
• InChI key: IBXNCJKFFQIKKY-UHFFFAOYSA-N

Description

General description

Selective and non-selective hydrogenation of 1-pentyne catalyzed by silica-supported palladium has been studied by in situ X-ray absorption spectroscopy.

Application

1-Pentyne has been used in preparation of:

• lithium acetylides, required for asymmetric synthesis of α,α-dibranched propargyl sulfinamides
• 7-hydroxy-10-methoxy-3H-naphtho[2.1-b]pyrans

Safety Information

• Pictograms: GHS02
• Signal Word: Danger
• Hazard Statements: H225
• Precautionary Statements: P210 - P233 - P240 - P241 - P242 - P243
• Hazard Classifications: Flam. Liq. 2
• Storage Class Code: 3 - Flammable liquids
• WGK: WGK 3
• Flash Point(F): -4.0 °F - closed cup
• Flash Point(C): -20 °C - closed cup
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves