ChemicalBook Product Catalog Chemical Reagents Organic reagents Olefin (cyclic and acyclic) Diethyl squarate

Diethyl squarate

Diethyl squarate Basic information
Product Name:Diethyl squarate
Synonyms:3,4-DIETHOXYCYCLOBUTANE-1,2-DIONE;Diethyl squarate, Squaric acid diethyl ester;SQUARIC ACID DIETHYL ESTER,(DIETHYL SQUARATE, 3,4-DIETHOXY-3-CYCLOBUTENE-1,2-DIONE);DIETHOXYCYCLOBUTENEDIONE;3,4-DIETHOXY-3-CYCLOBUTENE-1,2-DIONE 98%;SQUARICACIDDIETHYLESTER/3,4-DIETHOXY-3-CYCLOBUTENE-1,2-DIONE;3,4-Diethoxy-3-cyclobuten-1,2-dion;Diethyl quadratate
CAS:5231-87-8
MF:C8H10O4
MW:170.16
EINECS:
Product Categories:Cyclobutanes & Cyclobutenes;Simple 4-Membered Ring Compounds;Ring Systems;Aluminium foil bag/Fluoride bottle or on your request
Mol File:5231-87-8.mol
Diethyl squarate Structure
Diethyl squarate Chemical Properties
Melting point 13-18 °C
Boiling point 95 °C0.1 mm Hg(lit.)
density 1.15 g/mL at 25 °C(lit.)
refractive index n20/D 1.509(lit.)
Fp >230 °F
storage temp. 2-8°C
form Liquid
color Clear yellow to light brownish
Water Solubility insoluble
BRN 640626
InChIKeyDFSFLZCLKYZYRD-UHFFFAOYSA-N
CAS DataBase Reference5231-87-8(CAS DataBase Reference)
NIST Chemistry Reference3,4-Diethoxy-3-cyclobutene-1,2-dione(5231-87-8)
Safety Information
Hazard Codes Xn,Xi
Risk Statements 36/37/38-42/43
Safety Statements 7-26-37/39-24-23
WGK Germany 3
RTECS GU1772466
F 10
Hazard Note Irritant
HS Code 29145090
MSDS Information
ProviderLanguage
ACROS English
SigmaAldrich English
ALFA English
Diethyl squarate Usage And Synthesis
Chemical Propertiesclear yellow to light brownish liquid
Uses3,4-Dethoxy-3-cyclobutene-1,2-dione is used as a starting material for synthesis of furanones and quinones. It undergoes ethoxy substitution with amines and unsaturated organosilanes.
UsesDiethyl squarate is an intermediate for pharma products, for photochemicals used in the dry-view process, in synthesis of photosensitive squaraine dyes (eg. laser dyes used in CD-Rom) and as intermediate for functional polymers.
General DescriptionThe 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.
Diethyl squarate Preparation Products And Raw materials
Preparation Products3,4-Dimethoxy-3-cyclobutene-1,2-dione-->3-(BENZYLAMINO)-4-ETHOXYCYCLOBUT-3-ENE-1,2-DIONE-->3-Cyclobutene-1,2-dione,3-amino-4-ethoxy-(9CI)-->3-[(2-ETHOXY-3,4-DIOXO-1-CYCLOBUTEN-1-YL)AMINO]-2-HYDROXY-N,N-DIMETHYL-BENZAMIDE
Squaric acid Fenofibric acid 3,4-Diisopropoxy-3-cyclobutene-1,2-dione Diethyl squarate Methylglyoxal 1,2-Cyclobutanedione 3-cyclobutene-1,2-dione Clethodim Norandrostenedione Dibutyl squarate Diethyl maleate moniliformin Diethyl succinosuccinate DIETHYL PHOSPHATE BUTYL OLEATE METHOXYACETALDEHYDE Diethyl pimelate Diethyl ethylmalonate
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