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

ALDRICH/123447 - ≥99.0% (HPLC)

Synonym: Squaric acid

CAS Number: 2892-51-5
Empirical Formula (Hill Notation): C₄H₂O₄
Molecular Weight: 114.06
EC Number: 220-761-4
MDL Number: MFCD00001334
Linear Formula: (HO)₂C₄(=O)₂
Product Type: Chemical

Catalog Number	PKG Qty.	Price	Quantity


45-123447-5G	5 g	$65.20 1/EA		Add To Favorites
45-123447-25G	25 g	$202.00 1/EA		Add To Favorites
45-123447-100G	100 g	$731.00 1/EA		Add To Favorites

Properties
Descriptions
Safety Info.
Basic Data

assay	≥99.0% (HPLC)
form	solid
InChI	1S/C4H2O4/c5-1-2(6)4(8)3(1)7/h5-6H
InChI key	PWEBUXCTKOWPCW-UHFFFAOYSA-N
mp	>300 °C (lit.)
Quality Level	200
SMILES string	OC1=C(O)C(=O)C1=O

Application:	3,4-Dihydroxy-3-cyclobutene-1,2-dione can be used: • In fluorescence detection in immunoassays, hybridization assays, enzymatic reactions, and other analytical procedures. • To form diffraction quality crystals. • To synthesize a squarate dianion, which is used as a building block to create uncharged polymeric networks. These ordered structures are used in catalysis, nonlinear optics, electrical conductivity, molecular recognition, and molecular sieves.
General description:	3,4-dihydroxy-3-cyclobutene-1,2 dione, commonly known as squaric acid, is widely used in bioorganic and medicinal chemistry. It is an inhibitor of glyoxylase, semiqauric acid, pyruvate dehrogenase, and transketolase. It is used as a replacement for phosphate in a peptide-based ligand for an SH₂ domain. Its derivatives are high-affinity ligands for excitatory amino acid receptors. These derivatives are also used as dyes for fluorescence detection of small biological molecules.
Packaging:	25, 100 g in poly bottle
Packaging:	5 g in glass bottle

Symbol	GHS05
Signal word	Danger
Hazard statements	H314
Precautionary statements	P260 - P280 - P301 + P330 + P331 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
Hazard Codes	Xi
Risk Statements	36/37/38-43
Safety Statements	26-36
RIDADR	NONH for all modes of transport
WGK Germany	WGK 3
Flash Point(F)	374.0 °F
Flash Point(C)	190 °C

Purity	≥99.0% (HPLC)
mp	>300 °C (lit.)
UNSPSC	12352103

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