Skip to Content
Merck
CN
All Photos(1)

Documents

Safety Information

689203

Sigma-Aldrich

3,4-Dihydroxy-3-cyclobutene-1,2-dione

Arxada quality, 98.50-101.00 % (w/w) (HPLC)

Synonym(s):

Squaric acid

Sign Into View Organizational & Contract Pricing
All Photos(1)

About This Item

Linear Formula:
(HO)2C4(=O)2
CAS Number:
2892-51-5
Molecular Weight:
114.06
Beilstein:
774275
EC Number:
220-761-4
MDL number:
MFCD00001334
UNSPSC Code:
12352100
PubChem Substance ID:
329761224
NACRES:
NA.22

quality

Arxada quality

manufacturer/tradename

Arxada AG

concentration

98.50-101.00 % (w/w) (HPLC)

impurities

≤0.5 % (w/w) water (Karl Fischer)

mp

>300 °C (lit.)

SMILES string

OC1=C(O)C(=O)C1=O

InChI

1S/C4H2O4/c5-1-2(6)4(8)3(1)7/h5-6H

InChI key

PWEBUXCTKOWPCW-UHFFFAOYSA-N

Looking for similar products? Visit Product Comparison Guide

Pictograms

Corrosion
GHS05

Signal Word

Danger

Hazard Statements

H314

Hazard Classifications

Eye Dam. 1 - Skin Corr. 1B

WGK

WGK 3

Flash Point(F)

374.0 °F

Flash Point(C)

190 °C

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Information

新产品

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Carlos E Silva et al.
The journal of physical chemistry. A, 114(37), 10097-10109 (2010-08-26)
This work presents the crystal structure and the investigation under a supramolecular perspective of a squaric acid derivative obtained from the replacement of the hydroxyl groups by anilines. The squaraine obtained (1,2-dianilinesquaraine) crystallizes in the Pbcn space group, in a
Dawei Cui et al.
Chemical communications (Cambridge, England), 47(4), 1348-1350 (2010-11-18)
We report a class of water-soluble and -stable cyclic amino squarates that ligate with cysteine or lysine residues without side-products in an entirely aqueous environment. The ligations include addition-elimination reactions that are promoted by water in a way similar to
Carsten Dingels et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 18(52), 16828-16835 (2012-11-09)
The covalent attachment of poly(ethylene glycol) (PEG) to therapeutically active proteins (PEGylation) has become an important method to deal with the pharmacological difficulties of these polypeptides, such as short body-residence times and immunogenicity. However, the derivatives of PEG used for
Carsten Grabosch et al.
Chembiochem : a European journal of chemical biology, 12(7), 1066-1074 (2011-04-08)
Bacteria use long proteinaceous appendages, called fimbriae or pili, to adhere to the surfaces of their host cells. Widely distributed among the Enterobacteriacae are type 1 fimbriae that mediate mannose-specific bacterial adhesion through the lectin FimH, located at the fimbrial
Bojidarka B Ivanova et al.
Amino acids, 39(1), 309-314 (2010-01-19)
The title compound, 2-(phenylethyl)ammonium hydrogensquarate hemihydrate, was synthesized and structurally and spectroscopically characterized by a single crystal X-ray diffraction and solid-state polarized IR spectroscopy of oriented colloids in a nematic host. The crystal structure consists of two crystallographically independent 2-(phenylethyl)ammonium
View All Related Papers

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service