76303-43-0

Basic information

• Product Name: 2-methoxy-5-(4-methoxy-3,6-dioxocyclohexa-1,4-dien-1-yl)benzene-1,4-diyl diacetate
• CAS NO: 76303-43-0
• Molecular Formula: C₁₈H₁₆O₈
• Molecular Weight: 360.3148
• Mol File: 76303-43-0.mol
• Article Data: 2

Chemical Properties

• Boiling Point: 530°C at 760 mmHg
• Flash Point: 234°C
• Density: 1.35g/cm³
• Vapor Pressure: 2.57E-11mmHg at 25°C
• Refractive Index: 1.57
• CAS DataBase Reference: 2-methoxy-5-(4-methoxy-3,6-dioxocyclohexa-1,4-dien-1-yl)benzene-1,4-diyl diacetate(CAS DataBase Reference)
• NIST Chemistry Reference: 2-methoxy-5-(4-methoxy-3,6-dioxocyclohexa-1,4-dien-1-yl)benzene-1,4-diyl diacetate(76303-43-0)
• EPA Substance Registry System: 2-methoxy-5-(4-methoxy-3,6-dioxocyclohexa-1,4-dien-1-yl)benzene-1,4-diyl diacetate(76303-43-0)

Safety Data

• Hazardous Substances Data: 76303-43-0(Hazardous Substances Data)

Upstream product

• 51281-73-3 2-(2',5'-dihydroxy-4'-methoxyphenyl)-5-methoxy-p-benzoquinone 
• 108-24-7 acetic anhydride 

Downstream Products

• 7461-72-5 2,5,2',5'-Tetraacetoxy-4,4'-dimethoxy-biphenyl 

Relevant articles and documents

The Photochemical Discolouration of Methoxy-p-benzoquinone in Solution

Irradiation of a dimethoxyethane solution of methoxy-p-benzoquinone with sun-light lamps results in discolouration of the solution and the rapid disappearance of the starting material.A strongly coloured red dibenzofuran derivative, 8-hydroxy-3,7-dimethoxybenzofuran-1,4-quinone, was isolated from the reaction mixture and identified by comparison with the synthesized compound.The photochemical reactions of the possible intermediates, the dimer quinones 5-methoxy-2-(2,5-dihydroxy-4-methoxyphenyl)1,4-benzoquinone and 4,4'-dimethoxybiphenyl-2,5,2',5'-bis-quinone, were also studied by visible light spectroscopy and significant changes in the spectra were observed.It is concluded that these dimer quinones and their rearrangement products play a significant role in the production of colour in old methoxy-p-benzoquinone solutions and other solutions in which this quinone participates as an intermediate.In alkaline aqueous solution the isolated dibenzofuran derivative rapidly disappears via radical reactions.