310778
3,4-Diethoxy-3-cyclobutene-1,2-dione
98%
Synonym(s):
Diethyl squarate, Squaric acid diethyl ester
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About This Item
Linear Formula:
(C2H5O)2C4(=O)2
CAS Number:
Molecular Weight:
170.16
UNSPSC Code:
12352100
NACRES:
NA.22
PubChem Substance ID:
MDL number:
Beilstein/REAXYS Number:
640626
Assay:
98%
Form:
liquid
Quality Segment
assay
98%
form
liquid
refractive index
n20/D 1.509 (lit.)
bp
95 °C/0.1 mmHg (lit.)
density
1.15 g/mL at 25 °C (lit.)
functional group
ether, ketone
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
InChI key
DFSFLZCLKYZYRD-UHFFFAOYSA-N
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.
Application
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.
signalword
Danger
hcodes
Hazard Classifications
Eye Irrit. 2 - Resp. Sens. 1 - Skin Irrit. 2 - Skin Sens. 1 - STOT SE 3
target_organs
Respiratory system
Storage Class
10 - Combustible liquids
wgk
WGK 3
flash_point_f
230.0 °F - closed cup
flash_point_c
110 °C - closed cup
ppe
Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter
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