156543-41-8

Basic information

• Product Name: 3H-Pyrazol-3-one, 2-ethyl-1,2-dihydro-5-methyl-4-nitroso-
• Synonyms: 3H-Pyrazol-3-one, 2-ethyl-1,2-dihydro-5-methyl-4-nitroso-
• CAS NO: 156543-41-8
• Molecular Formula: C6H9N3O2
• Molecular Weight: 155.15
• Mol File: 156543-41-8.mol
• Article Data: 1

Chemical Properties

• Appearance: /
• CAS DataBase Reference: 3H-Pyrazol-3-one, 2-ethyl-1,2-dihydro-5-methyl-4-nitroso-(CAS DataBase Reference)
• NIST Chemistry Reference: 3H-Pyrazol-3-one, 2-ethyl-1,2-dihydro-5-methyl-4-nitroso-(156543-41-8)
• EPA Substance Registry System: 3H-Pyrazol-3-one, 2-ethyl-1,2-dihydro-5-methyl-4-nitroso-(156543-41-8)

Safety Data

• Hazardous Substances Data: 156543-41-8(Hazardous Substances Data)

Upstream product

• 19364-68-2 2-ethyl-2,4-dihydro-5-methyl-3H-pyrazol-3-one 

Relevant articles and documents

Synthesis and Prototropic Tautomerism of 1-n-Alkyl-3-methyl-4-nitroso-5-pyrazolones

Nitrosation at C-4 of 1-n-alkyl-3-methyl-5-pyrazolones is achieved in about 50percent yield with sodium nitrite in hydrochloric acid medium.A tautomeric equilibrium in solution with a proton moving from the OH at C-5 to N-2 in the nitrosated pyrazolones is proposed.