42046-91-3

Basic information

• Product Name: 1-ethenyl-5-methyl-1H-pyrazole
• Synonyms: 1H-Pyrazole, 1-ethenyl-5-methyl-
• CAS NO: 42046-91-3
• Molecular Formula: C₆H₈N₂
• Molecular Weight: 108.1411
• Mol File: 42046-91-3.mol
• Article Data: 4

Chemical Properties

• Boiling Point: 76.1°C at 760 mmHg
• Density: 0.94g/cm³
• Vapor Pressure: 102mmHg at 25°C
• Refractive Index: 1.513
• CAS DataBase Reference: 1-ethenyl-5-methyl-1H-pyrazole(CAS DataBase Reference)
• NIST Chemistry Reference: 1-ethenyl-5-methyl-1H-pyrazole(42046-91-3)
• EPA Substance Registry System: 1-ethenyl-5-methyl-1H-pyrazole(42046-91-3)

Safety Data

• Hazardous Substances Data: 42046-91-3(Hazardous Substances Data)

Upstream product

• 96450-54-3 1-(β-chloroethyl)-5-methylpyrazole 
• 873431-57-3 1-[5-methyl-1H-pyrazol-1-yl]ethyl acetate 
• 1453-58-3 3-Methylpyrazole 
• 107-06-2 1,2-dichloro-ethane 
• 74-86-2 acetylene 

Relevant articles and documents

Dehydrochlorination of 1-(2-chloroethyl)azoles in aqueous solution of N-methylmorpholine N-oxide

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Synthesis of N-vinylpyrazoles

A method is proposed for the alkylation of pyrazoles with dichloroethane in water in the presence of the phase-transfer catalyst benzyltriethylammonium chloride (TEBAC). It was shown that dehydrochlorination of the corresponding N-(β-chloroethyl)pyrazoles in water under conditions of phase-transfer catalysis proceeds smoothly with the formation of N-vinylpyrazoles in 80-90% yield. 2005 Springer Science+Business Media, Inc.