21647-15-4

Basic information

• Product Name: 3,4-bis(butylamino)cyclobut-3-ene-1,2-dione
• CAS NO: 21647-15-4
• Molecular Formula: C₁₂H₂₀N₂O₂
• Molecular Weight: 224.2994
• Mol File: 21647-15-4.mol
• Article Data: 1

Chemical Properties

• Boiling Point: 325.5°C at 760 mmHg
• Flash Point: 116.6°C
• Density: 1.06g/cm³
• Vapor Pressure: 0.00023mmHg at 25°C
• Refractive Index: 1.505
• CAS DataBase Reference: 3,4-bis(butylamino)cyclobut-3-ene-1,2-dione(CAS DataBase Reference)
• NIST Chemistry Reference: 3,4-bis(butylamino)cyclobut-3-ene-1,2-dione(21647-15-4)
• EPA Substance Registry System: 3,4-bis(butylamino)cyclobut-3-ene-1,2-dione(21647-15-4)

Safety Data

• Hazardous Substances Data: 21647-15-4(Hazardous Substances Data)

Upstream product

• 109-73-9 N-butylamine 
• 5231-87-8 3,4-diethoxy-3-cyclobuten-1,2-dione 
• 2892-62-8 3,4-dibutoxy-3-cyclobutene-1,2-dione 

Relevant articles and documents

Electrochemistry of squarate and thiosquarate dianions

Squarate dianion C4O42- and its thiosquarate C4O(4-x)Sx2- (x=1, 2, 4) derivatives have been shown to be ligating agents towards metal ions.Their electrochemical properties in aprotic solvent (acetonitrile) is revisited, with the goal of generating radical-anions by anodic oxidation of the dianions.Among these compounds, only C4O42- leads by anodic oxidation to a radical-anion C4O4.-, stabilized by electron delocalization.The thioderivatives form disulfides by radical condensation which suggests that the electron is localized on the sulfur atoms.