4209-44-3

Basic information

• Product Name: 2H-Pyran-2-one, 5,6-dimethyl-
• CAS NO: 4209-44-3
• Molecular Formula: C7H8O2
• Molecular Weight: 124.139
• Mol File: 4209-44-3.mol
• Article Data: 2

Chemical Properties

• CAS DataBase Reference: 2H-Pyran-2-one, 5,6-dimethyl-(CAS DataBase Reference)
• NIST Chemistry Reference: 2H-Pyran-2-one, 5,6-dimethyl-(4209-44-3)
• EPA Substance Registry System: 2H-Pyran-2-one, 5,6-dimethyl-(4209-44-3)

Safety Data

• Hazardous Substances Data: 4209-44-3(Hazardous Substances Data)

Upstream product

• 62968-76-7 2,3-dimethyl-4-hydroxypyrylium cation 
• 41463-78-9 2,6-dimethyl-4-hydroxypyrylium cation 
• 73761-48-5 2,3-dimethyl-4-pyrone 

Relevant articles and documents

Photochemistry of 4-Hydroxypyrylium Cations in Aqueous Sulfuric Acid

4-Hydroxypyrylium cations that are known to undergo phototransposition to 2-hydroxypyrylium cations in concentrated sulfuric acid were observed to undergo photo-ring contraction in 50percent sulfuric acid.The initial products observed when the irradiations are carried out at 0 deg C are 4,5-dihydroxycyclopent-2-enones that can be isolated.At higher temperatures these initial products undergo secondary acid catalyzed thermal reactions to yield substituted acetylfurans.