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.)

Flash point:

>230 °F

storage temp. 

2-8°C

form 

Liquid

color 

Clear yellow to light brownish

Water Solubility 

insoluble

BRN 

640626

InChIKey

DFSFLZCLKYZYRD-UHFFFAOYSA-N

CAS DataBase Reference

5231-87-8(CAS DataBase Reference)

NIST Chemistry Reference

3,4-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

• Language:English Provider:SigmaAldrich
• Language:English Provider:ACROS
• Language:English Provider:ALFA

Diethyl squarate Usage And Synthesis

Chemical Properties

clear yellow to light brownish liquid

Uses

3,4-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.

Uses

Diethyl 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 Description

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.

Diethyl squarate(5231-87-8)Related Product Information

• DIETHYL PHOSPHATE
• Diethyl maleate
• Quinocetone
• Diethyl ethylmalonate
• Norandrostenedione
• Trenbolone
• Gestodene
• BUTYL OLEATE
• Diethyl malonate
• Diethyl pimelate
• Diethyl succinosuccinate
• Diethyl cyanomethylphosphonate
• Clethodim
• Diethyl methylmalonate
• Methyl acrylate
• Tris(trimethylsilyl)phosphate
• Androstenedione
• Squaric acid