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3-methyl-1,4-dihydropyrazol-5-one (Molecular Formula: C4H6N2O)
Product Name: 3-methyl-1,4-dihydropyrazol-5-one
CAS Registry Number: 108-26-9
EINECS: 203-565-3  
Synonyms: 2,4-dihydro-5-methyl-; 2-PYRAZOLIN-5-ONE; NSC4120; 3-methylpyrazole-5-one; 3-METHYL-;3-Methyl-5-pyrazolone;3-methyl-1,4-dihydropyrazol-5-one; 3H-Pyrazol-3-one; 108-26-9;
Molecular Structure:
Molecular Formula: C4H6N2O
Molecular Weight: 98.10324
Density:  1.33 g/cm3
Boiling Point:  309.7°C at 760 mmHg
Melting Point:  220-224 ºC
Flash Point:  141.1°C
Refractive index:  1.475
Risk Codes:  S24/25
Safety Statements:  Moderately toxic by unspecified route. When heated to decomposition it emits toxic vapors of NOx.
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