339792

3,4-Dibutoxy-3-cyclobutene-1,2-dione

98%

• Synonym(s): Dibutyl squarate
• Linear Formula: [CH₃(CH₂)₃O]₂C₄(=O)₂
• CAS Number: 2892-62-8
• Molecular Weight: 226.27
• MDL number: MFCD00037150
• UNSPSC Code: 12352100
• PubChem Substance ID: 24860681
• NACRES: NA.22

Properties

• Assay: 98%
• form: liquid
• refractive index: n20/D 1.494 (lit.)
• bp: 139 °C/0.5 mmHg (lit.)
• density: 1.047 g/mL at 25 °C (lit.)
• SMILES string: CCCCOC1=C(OCCCC)C(=O)C1=O
• InChI: 1S/C12H18O4/c1-3-5-7-15-11-9(13)10(14)12(11)16-8-6-4-2/h3-8H2,1-2H3
• InChI key: XBRWELTXMQSEIN-UHFFFAOYSA-N

Description

General description

3,4-Dibutoxy-3-cyclobutene-1,2-dione is the dialkyl ester of squaric acid.

Application

3,4-Dibutoxy-3-cyclobutene-1,2-dione was used in the synthesis of novel semisquarylium dye, useful for highly selective Hg²⁺ sensing in aqueous media. It was also employed in the synthesis of 3-butoxy-4-(1,3,3-trimethyl-2,3-dihydro-1H-2-indolylidenemethyl)-3-cyclobutene-1,2-dione, intermediate for the synthesis of squaryl dyes.

Safety Information

• Pictograms: GHS07
• Signal Word: Warning
• Hazard Statements: H315,H317,H319,H335
• Precautionary Statements: P280 - P302 + P352 - P305 + P351 + P338
• Hazard Classifications: Eye Irrit. 2 - Skin Irrit. 2 - Skin Sens. 1 - STOT SE 3
• Target Organs: Respiratory system
• Storage Class Code: 10 - Combustible liquids
• WGK: WGK 3
• Flash Point(F): 235.4 °F - closed cup
• Flash Point(C): 113 °C - closed cup
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves