Ethynylbenzene

• CAT Number: R059649
• CAS Number: 536-74-3
• Molecular Formula: C8H6
• Molecular Weight: 102.14
• Purity: ≥95%
• Synonyms: 1-Phenylethyne; Ethynylbenzene; NSC 4957; Phenylacetylene; Phenylethyne
• Storage: -20°C
• IUPAC Name: ethynylbenzene
• InChI: InChI=1S/C8H6/c1-2-8-6-4-3-5-7-8/h1,3-7H
• InChIKey: UEXCJVNBTNXOEH-UHFFFAOYSA-N
• SMILES: C#CC1=CC=CC=C1

Ethynylbenzene（Cat No.:R059649）, also known as phenylacetylene, is an aromatic alkyne with the molecular formula C8H6. It consists of a benzene ring directly bonded to a terminal ethynyl (–C≡CH) group, making it a versatile intermediate in organic synthesis. This colorless to pale yellow liquid is reactive in a range of transformations, including Sonogashira couplings, click chemistry, and cycloadditions, allowing construction of complex aromatic or heterocyclic structures. Ethynylbenzene is used in the synthesis of pharmaceuticals, advanced materials, and specialty polymers, and it serves as a valuable scaffold in medicinal and materials chemistry research.