3,4-Diethoxy-3-cyclobutene-1,2-dione light brown liquid 

Diethyl squarate is a colorless liquid with a fruity odor. Diethyl squarate is used as a building block for the synthesis of various organic compounds, including pharmaceuticals, agrochemicals, and dye intermediate. It is also used as a flavoring agent in food and beverages. Diethyl squarate is a reactive compound and can undergo various chemical reactions, including Michael addition, Diels-Alder reaction, and nucleophilic substitution.  English name: 3,4-Diethoxy-3-cyclobutene-1,2-dione  English alias:3,4-Diethoxycyclobut-3-ene-1,2-dione; 3,4-Diethoxy-3-Cyclobutene-1,2-Dione; 3,4-diethoxycyclobut-3-ene-1,2-dione; Diethyl Squarate; Squaric Acid Diethyl Ester; CAS No. 5231-87-8 Molecular weight: 170.16300 Molecular formula: C8H10O4 Appearance and properties: transparent yellow to light brown liquid Density: 1.15 g/mL at 25 degrees C (lit.) Boiling point: 95 degrees C 0.1 mm Hg (lit.) Flash point: > 230 degrees F…