339792
3,4-Dibutoxy-3-cyclobutene-1,2-dione
98%
Synonym(s):
Dibutyl squarate
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About This Item
Linear Formula:
[CH3(CH2)3O]2C4(=O)2
CAS Number:
Molecular Weight:
226.27
NACRES:
NA.22
PubChem Substance ID:
UNSPSC Code:
12352100
MDL number:
Assay:
98%
Form:
liquid
Quality Level
assay
98%
form
liquid
refractive index
n20/D 1.494 (lit.)
bp
139 °C/0.5 mmHg (lit.)
density
1.047 g/mL at 25 °C (lit.)
functional group
ether, ketone
SMILES string
CCCCOC1=C(OCCCC)C(=O)C1=O
InChI
1S/C12H18O4/c1-3-5-7-15-11-9(13)10(14)12(11)16-8-6-4-2/h3-8H2,1-2H3
InChI key
XBRWELTXMQSEIN-UHFFFAOYSA-N
General description
3,4-Dibutoxy-3-cyclobutene-1,2-dione is the dialkyl ester of squaric acid.
Application
3,4-Dibutoxy-3-cyclobutene-1,2-dione was used in the synthesis of novel semisquarylium dye, useful for highly selective Hg2+ sensing in aqueous media. It was also employed in the synthesis of 3-butoxy-4-(1,3,3-trimethyl-2,3-dihydro-1H-2-indolylidenemethyl)-3-cyclobutene-1,2-dione, intermediate for the synthesis of squaryl dyes.
signalword
Warning
hcodes
Hazard Classifications
Eye Irrit. 2 - Skin Irrit. 2 - Skin Sens. 1 - STOT SE 3
target_organs
Respiratory system
Storage Class
10 - Combustible liquids
wgk
WGK 3
flash_point_f
235.4 °F - closed cup
flash_point_c
113 °C - closed cup
ppe
Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter
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Treatment of alopecia areata in children.
Niyati Mukherjee et al.
Pediatric annals, 38(7), 388-395 (2009-08-19)
Synthesis of novel squaraine dyes and their intermediates.
Tatarets AL, et al.
Dyes and Pigments, 64(2), 125-134 (2005)
Shigeki Inui et al.
The Journal of dermatology, 36(6), 323-327 (2009-06-09)
To study the effect of fexofenadine on extensive alopecia areata (AA), we evaluated retrospectively 121 patients with AA having alopecia in more than 50% of the scalp and followed them for at least 6 months. Patients were treated by immunotherapy
Global Trade Item Number
| SKU | GTIN |
|---|---|
| 339792-25G | 04061836684495 |
| 339792-5G | 04061836684501 |