310778

3,4-Diethoxy-3-cyclobuten-1,2-dion

98%

• Synonym(e): Quadratsäure-diethylester
• Lineare Formel: (C₂H₅O)₂C₄(=O)₂
• CAS-Nummer: 5231-87-8
• Molekulargewicht: 170.16
• Beilstein: 640626
• MDL-Nummer: MFCD00001333
• UNSPSC-Code: 12352100
• PubChem Substanz-ID: 24858814
• NACRES: NA.22

Eigenschaften

• Qualitätsniveau: 100
• Assay: 98%
• Form: liquid
• Brechungsindex: n20/D 1.509 (lit.)
• bp: 95 °C/0.1 mmHg (lit.)
• Dichte: 1.15 g/mL at 25 °C (lit.)
• SMILES String: CCOC1=C(OCC)C(=O)C1=O
• InChI: 1S/C8H10O4/c1-3-11-7-5(9)6(10)8(7)12-4-2/h3-4H2,1-2H3
• InChIKey: DFSFLZCLKYZYRD-UHFFFAOYSA-N

Beschreibung

Allgemeine Beschreibung

The reaction of 3,4-diethoxy-3-cyclobutene-1,2-dione (squaric acid diethyl ester) with glycosylamines (formed by reducing oligosaccharides) was studied. The derivatives formed were linked to amino-functionalized lipids, solids or proteins.

Anwendung

Useful starting material for synthesis of furanones and quinones. Also undergoes ethoxy substitution with amines and unsaturated organosilanes.

Sicherheitshinweise

• Piktogramme: GHS07,GHS08
• Signalwort: Danger
• H-Sätze: H315 - H317 - H319 - H334 - H335
• P-Sätze: P261 - P264 - P271 - P280 - P302 + P352 - P305 + P351 + P338
• Gefahreneinstufungen: Eye Irrit. 2 - Resp. Sens. 1 - Skin Irrit. 2 - Skin Sens. 1 - STOT SE 3
• Zielorgane: Respiratory system
• Lagerklassenschlüssel: 10 - Combustible liquids
• WGK: WGK 3
• Flammpunkt (°F): 230.0 °F - closed cup
• Flammpunkt (°C): 110 °C - closed cup
• Persönliche Schutzausrüstung: Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter