303666

2-Butynoic acid

98%

• Synonym(s): Tetrolic acid
• Linear Formula: CH₃C≡CCO₂H
• CAS Number: 590-93-2
• Molecular Weight: 84.07
• EC Number: 209-695-7
• MDL number: MFCD00004363
• UNSPSC Code: 12352100
• PubChem Substance ID: 24858137
• NACRES: NA.22

Properties

• Quality Level: 100
• Assay: 98%
• form: solid
• mp: 78-80 °C (lit.)
• SMILES string: CC#CC(O)=O
• InChI: 1S/C4H4O2/c1-2-3-4(5)6/h1H3,(H,5,6)
• InChI key: LUEHNHVFDCZTGL-UHFFFAOYSA-N

Description

General description

The rotational spectrum of 2-butynoic acid was measured by pulsed supersonic-jet Fourier transform microwave spectroscopy.

Application

2-Butynoic acid was employed as synthon in a variety of reactions, including cycloacylation of phenols to flavones and chromones, and cyclization to γ-butyrolactones. It was also used in synthesis of Z-trisubstituted olefins via γ-alkylation.

Safety Information

• Pictograms: GHS05
• Signal Word: Danger
• Hazard Statements: H314
• Precautionary Statements: P260 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338 - P363
• Hazard Classifications: Eye Dam. 1 - Skin Corr. 1B
• Storage Class Code: 8A - Combustible corrosive hazardous materials
• WGK: WGK 3
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves